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The ATC Doublecut with Micah Woods
I discuss ATC blog posts, with supplementary information, stories, and the reasons why I thought the topic was worth writing about, and worth reading about. Thus, a doublecut of these topics. This covers grass selection, playability, and all the work done to create a certain type of turfgrass surface.
- 135 - Optimal and practical overseeding windows with Jim Huntoon
Jim Huntoon joined me from Horry-Georgetown Technical College to discuss overseeding and the hows and whys of this common practice on warm-season turf that goes dormant in winter.
We discussed these two blog posts:
- https://www.asianturfgrass.com/post/optimum-overseeding-time-windows/
- https://www.asianturfgrass.com/post/zoysia-beats-bermuda-on-some-greens/You can see my slides and handout from the Palmetto GCSA Education Meeting at this link: https://www.asianturfgrass.com/seminar/palmetto-2024/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://www.asianturfgrass.com/newsletter/
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterFri, 19 Apr 2024 - 134 - Botanical walks, ecoregions, and MLSN for lawns with Maggie Reiter
Maggie Reiter joined me to reminisce about the grasses one can find at the back of the 7th green at Pebble Beach Golf Links, to consider soil test results for lawns, what the biggest problems are on lawns and whether solutions exists, and much more.
Maggie is a Data Scientist at Sunday, https://www.getsunday.com/
The blog post with the photo of grasses at Pebble Beach is: https://www.asianturfgrass.com/post/flights-turf-photos/
We discussed EPA ecoregion maps, which you can read more about at https://www.epa.gov/eco-research/ecoregions and can see the especially detailed ones at https://www.epa.gov/eco-research/level-iii-and-iv-ecoregions-continental-united-states
The original MLSN guidelines, first presented at the Bouyoucos Conference in 2012, are available at: https://www.paceturf.org/PTRI/Documents/201408_stowell_woods_mlsn.pdf
MLSN calculations for micronutrients are here: https://www.paceturf.org/memberedition/mlsn-for-micronutrients
The Carrow et al. article from 2004 on SLAN ranges is available at https://www.files.asianturfgrass.com/clarify3.pdf
Soil test lab tour at Brookside Labs: https://youtu.be/PyL2bfdiBdERead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://www.asianturfgrass.com/newsletter/
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Sat, 30 Mar 2024 - 133 - An example of ample light when temperature limits growth
This is a follow-up to the episode last week when I mentioned that I was looking at snow outside, that the light would be ample for growth, but the temperatures were below freezing and thus temperature was limiting the growth. I discuss the new blog post that shows those light data.
An example of ample DLI: https://www.asianturfgrass.com/post/an-example-of-ample-dli/
The USGA Green Section Record with the fine podcast, frost research, Pat Jones article, and much more: https://www.asianturfgrass.com/post/breaking-the-ice/
The @TurfgrassEpistemology episode with Travis Shaddox on K and soil testing: https://www.youtube.com/live/aSZwz75aIig?si=Ip9JcBo41Poy_Ras
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://www.asianturfgrass.com/newsletter/
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterFri, 22 Mar 2024 - 132 - The combination of light (DLI) and temperature (GP)
The growth potential converts air temperature to a 0 to 1 (or 0 to 100%) scale. Of course, there are a lot more things that affect actual growth, including light, nitrogen, and water. I discuss these and why I'm not so convinced that adding a light factor to GP makes it more useful.
The blog post discussed here is https://www.asianturfgrass.com/post/light-and-gp-again/
This calculator finds full sun PPFD and DLI for any location on any date: https://asianturfgrass.shinyapps.io/ppfd_by_time/
Park Nobel's environmental productivity index is described in this article: https://esajournals.onlinelibrary.wiley.com/doi/abs/10.2307/1938497
It's also mentioned in his text book Physiochemical and Environmental Plant Physiology: https://www.sciencedirect.com/book/9780128191460/physicochemical-and-environmental-plant-physiology
Travis Shaddox's Turfgrass Epistemology channel: https://www.youtube.com/@TurfgrassEpistemology
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://www.asianturfgrass.com/newsletter/
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterSat, 16 Mar 2024 - 131 - Leaf N normals from PACE, plus #OM246 video, #MLSN testing, #TurfMath, and soil test frequency
This episode goes through a lot of updates from both the ATC and the PACE Turf websites. Topics discussed include OM246, the problem with frequent soil testing, the problem when getting soil tests done by some fertilizer companies, normal N content of grass leaves, and coefficient of uniformity (Cu) of rootzone sands.
More information and and decision-making tools at https://www.paceturf.org/, this episode's sponsor.
Blog posts discussed include:
https://www.asianturfgrass.com/post/new-om246-video-script/ which corresponds with this video https://youtu.be/Tc8dcBBt1zchttps://www.asianturfgrass.com/post/nutrient-harvest-turf-math/https://www.asianturfgrass.com/post/testing-mlsn/https://www.asianturfgrass.com/post/couple-problems-with-year-round-soil-nutrient-analysis/https://www.asianturfgrass.com/post/five-down-one-to-go/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterSun, 10 Mar 2024 - 130 - Adam Moeller on sand, #OM246, #ClipVol, and putting green management in 2024
Adam Moeller joined me to discuss how to manage greens in 2024. We talked about his research at Purdue University on sand and bentgrass and coring and N rates, and about clipping volume and OM246 testing and how we might manage turf and look at sands today.
This post got the Doublecut introduction, about how to figure out an estimate of N harvest from clippings, and how to systematically adjust N rate based on turfgrass growth ratio: https://www.asianturfgrass.com/post/growth-ratio-nitrogen-harvest-and-fertilizer-adjustment/
Adam's website is https://www.moellerconsultingllc.com/
He posted this chart on X showing a particle size distribution curve: https://x.com/AdamMoeller/status/1756301012392960446
Here's another example of a curve from the PACE Turf gallery: https://www.paceturf.org/gallery/detail/s-curve-with-sand-particle-size-of-topdressing-sand-and-om2-sand
We discussed the 2016 article with Todd Lowe on Managing Organic Matter in Putting Greens and the sand topdressing recommendations in that article: https://gsrpdf.lib.msu.edu/?file=/article/moeller-lowe-managing-11-4-16.pdf
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/Turfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterSat, 17 Feb 2024 - 129 - Physical testing of golf putting green rootzones & soil nutrient sampling with Brian Mavis
Brian joined me to discuss his recommended soil sampling strategy for an 18 hole golf course. We also discussed what he teaches in a 2 hour GCSAA seminar on physical testing.
Mavis Consulting website with lots of resources: http://mavisconsulting.com/
This blog post on soil sampling got the Doublecut treatment: https://www.asianturfgrass.com/post/composite-samples-1/
Brian's article on turf testing techniques from GCM magazine: https://www.gcmonline.com/course/maintenance/news/turf-testing-techniques
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Tue, 13 Feb 2024 - 128 - Forget about fertilizing with carbon, with Dr. Bryan Hopkins
The 2018 article by Bryan and Tyler Hopkins, "Carbon: the next frontier in fertilization?" concludes that we "should not be fertilizing with carbon." Bryan joined me to discuss this article.
The blog post about their article remains one of the top viewed on the ATC website, six years after publication: https://www.asianturfgrass.com/post/is-carbon-the-next-frontier-in-fertilization/
Original article from Crops & Soils: https://doi.org/10.2134/cs2018.51.0307My calculation of how much carbon is in the soil: https://www.asianturfgrass.com/post/how-much-carbon-and-humus-are-in-the-soil/
Dr. Carrow's calculations of humic material in the soil: https://www.asianturfgrass.com/post/asking-the-right-questions/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://www.asianturfgrass.com/newsletter/
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterSat, 10 Feb 2024 - 127 - Annual sand topdressing quantities, zoysia seeds, and a measuring laser
Zoysiagrass can seed year round when the conditions are right. In this episode, I discuss what those conditions are, share some tools for getting a site-specific sand topdressing estimate, describe the reshuffling of top posts on the ATC website, and discuss using a line laser to measure the effective height of cut.
I have also recently been the guest on The Tie podcast and on The Talking Greenkeeper. Listen to those episodes and then let me know if you think the philosophy of greenkeeping I discussed makes any sense.
The Tie: https://podcasts.apple.com/us/podcast/micah-woods-leading-turf-grass-scientist/id1583596139?i=1000643868377The Talking Greenkeeper: https://podcasts.apple.com/us/podcast/the-micah-woods-annual-holiday-special/id1435947281?i=1000639222356Zoysia seeds: https://www.asianturfgrass.com/post/daylength-temperature-and-zoysia-seeds/Annual sand topdressing amounts: https://www.asianturfgrass.com/post/annual-sand-topdressing-amounts/Top post reshuffle: https://www.asianturfgrass.com/post/the-annual-reshuffling-of-top-posts/Effective cutting height with laser measurement: https://www.asianturfgrass.com/post/measuring-effective-cutting-height-with-a-laser/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/Turfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Sat, 03 Feb 2024 - 126 - Blog post bombs of 2023 with Joe Gulotti
Joe Gulotti, The Talking Greenkeeper, joined me to discuss the ATC blog posts that received the fewest views in 2023. We give these topics one more chance, while talking about quality of ball roll, playability, fertilizer, surface firmness, seminars, translation, and much more.
The blog post with these 10 blog post "bombs" is https://www.asianturfgrass.com/post/ten-posts-no-one-read-2023/
Joe's The Talking Greenkeeper podcast is at https://podcasts.apple.com/us/podcast/the-talking-greenkeeper/id1435947281
Our "Holiday Special" episode is at https://podcasts.apple.com/us/podcast/the-micah-woods-annual-holiday-special/id1435947281?i=1000639222356
Joe's conversation with Matt Shaffer is at https://podcasts.apple.com/us/podcast/matt-shaffer/id1435947281?i=1000642712369
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Sun, 28 Jan 2024 - 125 - Nitrogen, coring, the pH chart, hourly ET, growth rate, and surface hardness: top posts of the year
With Google Analytics I can check the pages on the ATC website that get the most views. These were the ten posts from 2023 that got the most pageviews.
These posts are listed, with direct links to each, at https://www.asianturfgrass.com/post/ten-posts-no-one-read-2023/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Mon, 22 Jan 2024 - 124 - Photos remind me of what I learned last year
I looked through my "Flights and favorite turf photos" post to see what I learned, or what I was reminded of, through these photos. I discuss N rate, grass species, dormancy, traffic, leaf area, crew size, Poa annua, pesticides, and a lot more.
This is the post I discussed: https://www.asianturfgrass.com/post/flights-favorite-turf-photos-2023/
I mentioned my book "A Short Grammar of Greenkeeping" https://leanpub.com/short_grammar_of_greenkeeping
Here are some related videos:
- About spouter sprayer https://youtube.com/shorts/MvAyLk-ZQnU?feature=share
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/
- About Australian Open volunteer experience https://youtu.be/RCaf5ByHW2Y
- The Tour de Fungus https://youtube.com/shorts/x36-KkZ_VFo?feature=share
- Botanical walk (tropical beachgrass) https://youtu.be/divHyrH_iPs
- Botanical walk (absence of seashore paspalum by the sea) https://youtu.be/KOo6yEgi5igSun, 14 Jan 2024 - 123 - How a conference education program gets put together with Deb Burnett & Sami Strutt
In 2018, I delivered four presentations/classes at the Continue to Learn education conference in Harrogate, England. Deb Burnett and Sami Strutt from BIGGA joined me to discuss how an education program gets put together and evaluated.
The Doublecut post was: https://www.asianturfgrass.com/post/four-presentations-at-btme/BIGGA website: https://www.bigga.org.uk/BTME website: https://www.btme.org.uk/Continue to Learn website: https://www.btme.org.uk/continue-to-learn.html
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Wed, 10 Jan 2024 - 122 - Topdressing by rote isn't the best way to do it, with Chris Tritabaugh
Chris Tritabaugh joined me to discuss sand topdressing, a long-running conversation we've been having with Dr. John Kaminski, the quantities of sand and N that are recommended vs. the amounts that seem to be required in modern turf maintenance, and much more.
We discussed this post from the ATC website about nitrogen, coring, and sand: https://www.asianturfgrass.com/post/i-was-surprised-to-read-this-about-nitrogen-coring-and-sand/
Chris and I spoke about a similar topic in this ATC Office Hours episode: https://www.youtube.com/watch?v=atipVSlT1ws
You can read Chris's Substack newsletter at https://ctunderscoreturf.substack.com?utm_source=navbar&utm_medium=web&r=dakt8
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Mon, 08 Jan 2024 - 121 - Robotic automowers for golf course (and all kinds of) turf with Janne Lehto, MG
Janne Lehto from Hirsala Golf joined me to discuss robotic automowers. Hirsala Golf currently has a fleet of 36 machines, mowing all fairways and 75% of the rough with these autonomous mowers. We discussed mowing heights, some of the interesting benefits that come with using these types of machines, and discussed a few drawbacks.
Find Janne on Intstagram at https://www.instagram.com/gcc_jannenestori/
His website is https://turfgrassmastery.fi/Janne and I talked about automowers in this Cart Rides episode: https://youtu.be/efFGhteKiu0?si=klmO-SxhZvYjJDjG
We discussed the research about improved turf quality and energy savings when using automowers on manilagrass turf in Italy: https://www.asianturfgrass.com/post/produced-higher-quality-turf-autonomous/
We also discussed the source of electricity and C emissions: https://www.asianturfgrass.com/post/mowing-electricity-energy/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Fri, 05 Jan 2024 - 120 - Updated OM246 sampling guide, GP is not MLSN, and soil samples don't dry too much
I talked about some recent blog posts, including updated #OM246 sampling instructions, there is no such thing as an MLSN nitrogen rate, soil samples cannot dry too much, and more.
Links to these posts are:
- https://www.asianturfgrass.com/post/mlsn-is-not-gp/
- PACE climate appraisal form https://www.paceturf.org/journal/climate
- https://www.asianturfgrass.com/post/updated-om246-sampling-instructions/
- https://www.asianturfgrass.com/post/seminars-and-conferences-past-present-and-future/
- https://www.asianturfgrass.com/post/how-long-can-soil-samples-dry/
- https://www.asianturfgrass.com/post/quantitative-vs-qualitativea-little-goes-a-long-way/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Sun, 24 Dec 2023 - 119 - Wetting agent re-application intervals by growing degree days (GDD) with Bill Kreuser
Can soil surfactant (wetting agent) applications be scheduled based on site temperatures? Can a growing degree day model work for this? Dr. Bill Kreuser, president of Greenkeeper, joined me to discuss his exciting progress with this research.
- ATC blog post on what wetting agents really do: https://www.asianturfgrass.com/post/what-do-wetting-agents-really-do/
- Greenkeeper website post on this new era in wetting agent programming: https://www.greenkeeperapp.com/marketing/index.php/a-new-era-in-wetting-agent-programming/
- PACE Turf video on the water droplet penetration test: https://youtu.be/ujtvjFvKPJk?si=cHEUyCFhrDkyH4QE
- Birdie dances including two from Mammoth Dunes, thanks to Bill for the fine photography https://www.micahwoods.com/post/evolution-style/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Tue, 19 Dec 2023 - 118 - Bentgrass greens in Perth summer temperatures with Fraser Brown
Lake Karrinyup Country Club in Perth, Western Australia has creeping bentgrass greens and sometimes sees high temperatures over 40 °C. Course superintendent Fraser Brown joined me to discuss how he and the maintenance team manage the grass in this year-round golfing climate.
Find Fraser on X at https://twitter.com/FraserJBrown_
Read the ATM profile "From Kingussie to Karrinyup" about Fraser: https://files.asianturfgrass.com/2023_atm_fraser_brown.pdf
We discussed growing bentgrass in tropical temperatures: https://www.asianturfgrass.com/post/bentgrass-tropical-temperatures/
We also discussed being reactive and proactive in greenkeeping: https://www.asianturfgrass.com/post/is-reactive-better-than-proactive/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Mon, 13 Nov 2023 - 117 - Maximum N rates that work when linked to growth potential (GP) with Dr. Michael Bekken
I spoke with Michael Bekken about normal nitrogen rates, why they vary so much, why that matters, what a normal N rate linked to growth potential (GP) might be, and greenhouse gas emissions from turfgrass maintenance.
We talked about:
- how to keep up with turf info from ATC and PACE Turf, https://www.asianturfgrass.com/post/whats-the-best-way-to-keep-up/
- ATC newsletters, https://www.asianturfgrass.com/newsletter/
- Bekken et al. on golf course nitrogen use efficiency: https://doi.org/10.1002/glr2.12049
- Bekken et al. on greenhouse gas emissions from golf course maintenance: https://doi.org/10.1002/its2.61
- my blog post on conventional mowers, electric mowers, and electricity generation: https://www.asianturfgrass.com/post/mowing-electricity-energy/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Fri, 10 Nov 2023 - 116 - Sand topdressing rates, soil organic matter/material, cultivation, and K with Chas Schmid
Dr. Chas Schmid has been involved with many of the same topics I often study and consider---sand topdressing, potassium fertilization, soil organic matter, putting green performance, and so on. His data, and plenty of photographic evidence, also show that there can be completely different outcomes than what I might have expected. We discuss this, on a range of topics, in this episode.
- Follow Chas on X: https://twitter.com/Chas_Schmid
- We discussed as a starting point, this blog post: https://www.asianturfgrass.com/post/updated-sand-topdressing-by-gp/
- This survey article about topdressing and OM: Organic Matter Concentration of Creeping Bentgrass Putting Greens in the Continental U.S. and Resident Management Impact: https://turf.unl.edu/Presentations/2018/the_canadian_2018_1.pdf
- Potassium and Poa annua: https://doi.org/10.2134/agronj2018.03.0147
- OSU 2023 summer field day book with updates on some of the projects we discussed: https://horticulture.oregonstate.edu/sites/agscid7/files/2023_osu_turf_summer_field_day_aug_31_2023_final.pdfRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Tue, 31 Oct 2023 - 115 - Fertilizer by "program" vs. application by a flexible system
This considers fertilizer programs, whether research can be misleading when fertilizer is applied at fixed rates on calendar schedules, and why I'm excited about the utility of the growth ratio.
Blog posts discussed include:
- https://www.asianturfgrass.com/post/already-proving-to-be-more-valuable-than-i-originally-expected/
- https://www.asianturfgrass.com/post/coring-three-times-a-year-is-recommended-when/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Sun, 29 Oct 2023 - 114 - Documenting progress by comparing totals from one year to the next with Jon Wall
I was a co-author, in 2013, of an article with the title "Documenting your progress toward sustainability." Jon Wall joined me to discuss this topic, and to consider whether keeping track of annual totals of inputs and resource use in a few key areas can be a meaningful way to document sustainable land management practices in the golf industry.
The blog post we discussed, with a link to the full article, is at: https://www.asianturfgrass.com/post/documenting-your-progress-toward-sustainability/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Mon, 23 Oct 2023 - 113 - How much soil organic matter is too much? Plus Zoysia, circle mows, botany, and ecology
I flipped through four recent blog posts, about zoysia seedheads on putting greens, the practical question of how much organic matter (or total organic material is too much), seminars in France, circle mows, and botanical walks to find grass growing in nature.
Links to these posts are:
https://www.asianturfgrass.com/post/seedheads-greens-height-zoysia/
https://www.asianturfgrass.com/post/how-much-om-is-too-much/
https://www.asianturfgrass.com/post/le-tour-de-france-de-micah-woods/
https://www.asianturfgrass.com/post/botanical-walks-and-circle-cuts/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Sun, 22 Oct 2023 - 112 - The bobble test scoring scale and what the test is used for with Chris Tritabaugh
Chris Tritabaugh joined me to discuss the #bobbletest scoring scale and the overall utility of this test. It is used for assessing the smoothness and trueness of ball roll on golf course putting greens. I find the measurements useful as a way to systematically adjust maintenance work.
The blog post we discussed, with a link to the "Perfectly True" article, and with the ATC scoring scale, is: https://www.asianturfgrass.com/post/bobble-test-rating-scale/
Two more videos on this topic are:
- https://youtu.be/0n09f5E5rKg?si=K2fQzyM5zUR_9QWb
- https://youtu.be/Fg_aDTB-O10?si=biDdK2AiR-bMy-4GRead Chris's Substack and get his podcast here: https://ctunderscoreturf.substack.com/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Wed, 18 Oct 2023 - 111 - Total organic material testing and reacting to soil test results with John Rowland
Dr. John Rowland from the USGA Green Section Florida region joined me to discuss soil sampling, seasonal soil pH changes, plus sampling and testing methodology for total organic material (#OM246) tests.
We discussed this post: https://www.asianturfgrass.com/post/seasonal-soil-ph-change/
See articles by Dr. Rowland, including the one we discussed about organic material testing, at https://tic.lib.msu.edu/tgif/flink?name=Rowland,%20John
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Wed, 11 Oct 2023 - 110 - Change in ball roll on putting greens from morning to afternoon
Everyone knows a golf green is smoothest right after the morning work, with some decrease in smoothness as the day goes on. How much does the smoothness and trueness of the roll decrease? I measured it.
The blog post discussed here is: https://www.asianturfgrass.com/post/one-chatter-or-snaking-event-in-every-third-ball-roll/
Linde et.al's article on "Comparing three methods to measure putting green trueness:" https://doi.org/10.2134/itsrj2016.05.0332
ATC Doublecut episode about the GS3 ball from the USGA: https://youtu.be/27ZkAUbs_sA?si=FjpJ3MScvKQVxv85
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Wed, 04 Oct 2023 - 109 - Using turf math, mg/kg, ppm, and fertilizer rates, with Bjarni Hannesson
Bjarni Hannesson joined me to discuss parts per million (ppm) and how that measure of nutrients in the soil can be expressed as a fertilizer rate, and vice versa. This turns out to be really useful. At least Bjarni and I think so.
For more, see the #MLSN cheat sheet: https://www.asianturfgrass.com/post/new-mlsn-cheat-sheet/
See the Global Soil Survey results and data at: https://osf.io/ej58z
See the PACE Turf MLSN page: https://www.paceturf.org/journal/minimum_level_for_sustainable_nutrition
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Tue, 19 Sep 2023 - 108 - Does a location exist with 365 days a year of high GP for cool-season grass?
The temperature-based growth potential, developed by PACE Turf, transforms the average air temperature to a growth potential (GP). The GP is conveniently scaled from 0 to 1 (or from 0 to 100%, if you prefer), and high GP values indicate that the air temperature is close to an optimum for grass growth. This episodes looks at a very interesting question: are there places on earth with a high GP for cool-season grass, all the year round?
See this blog post for charts and a full explanation: https://www.asianturfgrass.com/post/places-with-high-gp-all-year-long/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Thu, 14 Sep 2023 - 107 - "Blown away by the quality" of turfgrass by a simple method of adjusting N fertilizer
An anonymous golf course superintendent wrote that they were "blown away by the quality of these surfaces with an amount of nitrogen I would’ve thought was far too small." I discuss this, and some of the changes I'm made in my thinking about what is "far too small," or not. Also, I discuss some of the preventative fungicide and herbicide applications on golf courses in Japan that keep the zoysia surfaces looking so clean in winter.
See:
- https://www.asianturfgrass.com/post/nitrogen-amount-far-too-small/
- https://www.asianturfgrass.com/post/flipping-things-around/
- https://www.asianturfgrass.com/post/is-two-tenths-of-a-pound-of-nitrogen-a-lot-or-a-little/
- https://www.asianturfgrass.com/post/keeping-turf-free-of-weeds-diseases-insects/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Sun, 10 Sep 2023 - 106 - A daily tournament diary from the 2023 KBC Augusta golf tournament in Japan
I spent nine days at the KBC Augusta golf tournament in 2023. In this episode, I introduce the blog post with the daily diary of my observations and measurements during the week.
You can see the blog post at https://www.asianturfgrass.com/post/tournament-diary-kbc-augusta-2023/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Mon, 04 Sep 2023 - 105 - Reflections on a July with record heat and drought
Andrew McDaniel and I worked together at Habu CC in July 2001. We also worked together at the 50th KBC Augusta tournament in August 2023. I reflect on, and discuss, both of these, in this episode.
The blog post discussed is: https://www.asianturfgrass.com/post/looking-back-at-a-july-with-record-heat-and-drought/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Sat, 26 Aug 2023 - 104 - Green firmness measurements after using a 4 ton roller (it actually didn't firm the surface much)
Andrew McDaniel joined me from the Keya GC maintenance office to discuss firmness measurements of putting greens, using a 4 ton roller on the greens, and why the greens make a crunching noise when walking across them.
See the blog post we discussed at: https://www.asianturfgrass.com/post/putting-green-data-from-measurement-to-summary/
See the Shorts videos on the ATC YouTube channel: ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
See the crunchy zoysia green video on Twitter at: https://twitter.com/asianturfgrass/status/1694144794254361038?s=20
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Thu, 24 Aug 2023 - 103 - Tournament golf and zoysia greens are a fascinating combination
I recorded this from Keya Golf Club, which will host the 50th KBC Augusta golf tournament on korai (Zoysia matrella) putting greens this week. I explained why I find this grass on putting greens so interesting, and some of the measurements I'll be making this week.
I discussed this blog post: https://www.asianturfgrass.com/post/tournament-golf-on-zoysia-greens/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Sat, 19 Aug 2023 - 102 - The growth ratio for consistent growth and nitrogen fertilizer adjustment with Jason Haines
Jason Haines joined me for another #TurfMath episode to explain what the growth ratio is, how he uses it, and how he calibrates it.
See this post for the equation and links: https://www.asianturfgrass.com/post/the-growth-ratio-equation/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Thu, 10 Aug 2023 - 101 - Turf Math with Bjarni Hannesson and Jason Haines
We discussed the ease of metric units and the utility of knowing some key numbers in turfgrass maintenance.
We discussed this post: https://www.asianturfgrass.com/post/attractions-of-metric-units/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Mon, 07 Aug 2023 - 100 - Using morning and afternoon VWC measurements to find the site specific crop coefficient #TurfHacks
One of the things you can do when you are able to express soil water content as a depth of water, and vice versa, is to express the water loss rate from the soil divided by the reference evapotranspiration. Now you've got a rough estimate of a site specific crop coefficient.
I explained how to do that in this post: https://www.asianturfgrass.com/post/hourly-evapotranspiration-soil-water-content-and-crop-coefficient/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Get ATC newsletters at https://subscribepage.com/atc_newsletters
Turfgrass information and decision-making tools at https://www.paceturf.org/
PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Listen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/
Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/Mon, 31 Jul 2023 - 99 - A soil water content turf hack
For as long as I can remember, I've used the easy 1 mm = 1 L = 1% soil volumetric water content (VWC) relationship when converting between water use by grass, ET, irrigation, and soil VWC. Bill Kreuser shared the simple calculation to work this out in inches, for any rootzone depth.
The post discussed here is https://www.asianturfgrass.com/post/soil-water-content-turf-hacks/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Tue, 25 Jul 2023 - 98 - I prefer sand topdressing amounts expressed as a depth
I gave three reasons for my preference that sand topdressing amounts be expressed as a depth. One is consistency and standardization. Depth means the area to which the sand has been applied is already accounted for. Others include easy calculation and integration with #OM246, plus clear communication.
The posts discussed here include these:
https://www.asianturfgrass.com/post/three-reasons-sand-depth/https://www.asianturfgrass.com/post/more-observations-about-course-maintenance-in-japan/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find turfgrass information and decision-making tools at https://www.paceturf.org/See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturfSee the ATC newsletters at https://subscribepage.com/atc_newslettersListen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Fri, 21 Jul 2023 - 97 - Golf in Japan: maintenance staff numbers, rounds played, number of holes, and annual N rates
Did you know Japan has as many golf holes as England, Scotland, and New Zealand combined? I visited 11 golf facilities in Japan and discuss some of the interesting equipment and numbers related to the maintenance of those courses.
The blog post getting the #ATC2x treatment is: https://www.asianturfgrass.com/post/japan-golf-by-numbers/
The roller with "landing gear" and the 126 hole facility are in this post: https://www.asianturfgrass.com/post/rolling-japan-golf-best-zoysia-course-in-world/
More information about the International Turfgrass Society and the July 2025 International Turfgrass Research Conference in Japan at https://turfsociety.com/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Tue, 11 Jul 2023 - 96 - Grass gets this much PAR light in full sun (no clouds)
For any date, time, and location, it's possible to calculate the amount of light grass would get in full sun. I describe how this is done, and show a calculator that will find this value for you.
Direct link to the blog post: https://www.asianturfgrass.com/post/shade-and-sun/
Direct link to the PPFD calculator: https://asianturfgrass.shinyapps.io/ppfd_by_time/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Sun, 02 Jul 2023 - 95 - Coring three times a year with half-inch tines on bentgrass putting greens
A research article recommended two spring and one autumn hollow-tine aerification, supplemented by solid-tine aerification during summer, for creeping bentgrass putting greens in the transition zone.
I discussed this, and include links to the article, in this post: https://www.asianturfgrass.com/post/coring-three-times-a-year-is-recommended-when/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Mon, 26 Jun 2023 - 94 - The shade effect of clouds, photosynthetically active radiation, and 2 PAR apps
Clouds reduce photosynthetically active radiation by about 25% when you can still see your shadow. When you can't see your shadow, that's about 50% of PAR blocked. And when you can't see your shadow and can't find what part of the sky the sun is in, that's about 75% PAR reduction.
Read about this on a cloudy day in Tokyo, and see two apps that allow you to either check the full sun instantaneous PAR, the full sun daily PAR, or the past year of PAR, for pretty much anywhere in the world: https://www.asianturfgrass.com/post/shade-effect-of-clouds/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Sat, 24 Jun 2023 - 93 - It's tough to manage cool-season putting greens when ΔGP is less than 0
This episode introduces ΔGP, which is cool-season grass growth potential minus warm-season growth potential. Too many days like that and you won't bother trying to grow cool-season grass anymore. Also, best time of the year to soil sample, a superb podcast from Chris Tritabaugh, and a careful look at the difference between soil organic matter and total organic material.
These posts were discussed:
Delta GP and summer of 2022: https://www.asianturfgrass.com/post/last-summer-at-36-locations/Best time to soil sample: https://www.asianturfgrass.com/post/best-time-of-year-to-soil-sample/Tritabaugh, Rossi, and Park Grass: https://www.asianturfgrass.com/post/distracting-us-from-the-real-challenges/All about OM246 testing and the different procedures at the lab: https://www.asianturfgrass.com/post/all-about-om246/
See the ATC newsletters at https://subscribepage.com/atc_newslettersRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find turfgrass information and decision-making tools at https://www.paceturf.org/See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturfListen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Fri, 16 Jun 2023 - 92 - Transition zone putting greens, light, speed, zoysia, bermuda, and bentgrass with Mike Richardson
Mike Richardson from the University of Arkansas joined me to discuss zoysia on putting greens, light requirements of different grass species, grass selection in the transition zone, green speed, and winterkill in a wide ranging conversation. You can find Mike on Twitter at https://twitter.com/ArkansasTurf
Here are links to some of the topics we discussed:
- This post with the green speed by species kicked off this doublecut: https://www.asianturfgrass.com/post/green-speed-ridgeline-plot/
- Warm-season grass NTEP green speed: https://www.asianturfgrass.com/post/zoysia-green-speed/
- Thomas Walton's thesis about Lazer and Tifeagle on greens: https://scholarworks.uark.edu/etd/4396/
- Video with Tyler Carr about greens-type zoysia in Knoxville: https://youtu.be/oNw9fPqm6YY
- Article by Karcher, Richardson, and O'Brien on measuring light: https://gcmonline.com/course/environment/news/turfgrass-light-requirements
- Travis Russell's thesis on daily light integral: https://scholarworks.uark.edu/etd/2778/
- Global DLI app to find DLI at your location: https://youtu.be/6kPkHRVIAww
- The Turfgrass Twilight zone, from a 1952 report: https://www.asianturfgrass.com/post/turfgrass-twilight-zone/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Wed, 31 May 2023 - 91 - Reflections on growth rate, nitrogen, and disruption, with Chris Tritabaugh
I wrote a blog post that lists ten things I reflected on one day in relation to how I had changed my thinking about how much N, growth, and sand topdressing and core aerification are required to maintain high performance turfgrass surfaces. Chris Tritabaugh joined me to discuss this.
Blog post with the ten points: https://www.asianturfgrass.com/post/reflections-on-growth-rate-and-nitrogen/
Chris's podcast & newsletter: https://ctunderscoreturf.substack.com/
ATC Office Hours discussion with Richard Forsyth: https://www.youtube.com/live/T-w6CQzGzKc?feature=share
ATC Doublecut about organic matter and organic material terminology with Brian Whitlark: https://youtu.be/tMfby5xR2IM
Chris Tritabaugh and I talking about #OM246 and putting green maintenance on two ATC Office Hours: first (https://www.youtube.com/live/J5_5mDJ-Vxc?feature=share) second (https://www.youtube.com/live/LUEifgCMhyw?feature=share)
Quantifying golf course nitrogen use efficiency by Bekken and Soldat: https://doi.org/10.1002/glr2.12024Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Thu, 25 May 2023 - 90 - A soil test extravaganza
This episode discusses three recent posts about soil testing (soil nutrient analyses), from what happens at the lab, to micronutrient test results.
- Brookside Lab video tour: https://www.asianturfgrass.com/post/behind-the-scenes-look-at-soil-testing/
- The video: https://youtu.be/PyL2bfdiBdE
- Converting between different extraction methods: https://www.asianturfgrass.com/post/converting-between-soil-test-extraction-methods/
- Manganese and the MnAI: https://www.asianturfgrass.com/post/manganese-in-soils-and-the-mnai/I also mentioned the increase in available N that can happen when soils are stored in a field wet condition at ambient air temperatures: https://www.asianturfgrass.com/post/reminder-to-air-dry-soil-samples/
Get the ATC blog by email at https://subscribepage.com/atc_blog_email
To get on the ATC soil test email list, sign up here: https://subscribepage.com/soilRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Mon, 22 May 2023 - 89 - Blog post bombs of 2020 with The Talking Greenkeeper
Joe Gulotti joined me to go through the list of blog posts that got the fewest views on the ATC website in 2020. There was turf tourism, turf hacks, soil sampling, photosynthetically active radiation, four wheelers, and a lot of turf talk as we went through the list.
- To get the ATC blog by email: https://subscribepage.com/atc_blog_emailWe discussed this post: https://www.asianturfgrass.com/post/ten-posts-no-one-read-last-year/The Talking Greenkeeper podcast: https://podcasts.apple.com/us/podcast/the-talking-greenkeeper/id1435947281Follow Joe Gulotti on Twitter: https://twitter.com/hardg43We discussed a recent ATC Office Hours with Richard Forsyth: https://www.youtube.com/live/T-w6CQzGzKc?feature=shareAnd a recent ATC Doublecut with Brian Whitlark: https://youtu.be/tMfby5xR2IMThe Global DLI app, to find the past year of photosynthetically active radiation anywhere in the world, is at: https://asianturfgrass.shinyapps.io/global_dli/
Sun, 14 May 2023 - 88 - Terminology of turfgrass soils: total organic material (#OM246) and soil organic matter (SOM)
Brian Whitlark is the West region director of the USGA Green Section. We talked about total organic material testing of turfgrass soils. This is distinct from soil organic matter testing. Soil organic matter is measured on material that has already passed a 2 mm sieve and thus is no larger than a grain of sand. This sieving removes much of the thatch and mat and living plant material from the sample.
- There's more about this, including definitions of various items related to this, in https://www.asianturfgrass.com/post/organic-matter-terminology-in-turfgrass-soils/You can see how a soil sample is tested in this video from Brookside Labs https://youtu.be/PyL2bfdiBdERichard Forsyth from Royal Melbourne also spoke about something related to the shear strength that Brian and I discussed https://www.youtube.com/live/T-w6CQzGzKc?feature=share
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/See the ATC YouTube channel at https://www.youtube.com/@asianturfgrassFind turfgrass information and decision-making tools at https://www.paceturf.org/See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturfSee the ATC newsletters at https://subscribepage.com/atc_newslettersListen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Thu, 11 May 2023 - 87 - Potassium fertilizer could increase dandelions by 20x
Dandelion (Taraxacum officinale) abundance can be increased by potassium (K) and lime applications. Adding K fertilizer when it is not needed by the grass, or adding lime to increase the pH when the grass does not require such an adjustment, could lead to increased competitiveness of dandelions in that sward.
Some links for this episode include:
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find turfgrass information and decision-making tools at https://www.paceturf.org/See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturfSee the ATC newsletters at https://subscribepage.com/atc_newslettersListen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/
- My dandelions and potassium post: https://www.asianturfgrass.com/post/potassium-dandelions/
- Tilman et al.'s article on biological weed control of dandelions: https://doi.org/10.1890/1051-0761(1999)009[0103:BWCVNC]2.0.CO;2
- The article with Frank Rossi about Park Grass from the Green Section Record: https://www.asianturfgrass.com/post/fertilizer-and-weeds-at-park-grass/
- Park Grass photo gallery: https://www.asianturfgrass.com/post/park-grass-photos/
- Rothamsted's Park Grass experiment video: https://youtu.be/-3-Pm5JUQZ4Sat, 06 May 2023 - 86 - Using the standard growth potential (GP) equation allows direct comparisons from site to site
I used to tell people that GP is just a number, and if they wanted to modify it to fit the way grass grows at their location, then go ahead and do so. I don't say that anymore. Instead, I recommend using the standard equation. Why? To facilitate direct comparisons between sites, knowing that everyone has used the same equation.
I discussed this blog post: https://www.asianturfgrass.com/post/regarding-gp-and-adjustments/
PACE Turf's updated listing of turf diagnostic labs is available at: https://www.paceturf.org/public/turf_diagnostic_labs
Read more about OM246 tests at: https://www.asianturfgrass.com/project/om246/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find turfgrass information and decision-making tools at https://www.paceturf.org/See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturfSee the ATC newsletters at https://subscribepage.com/atc_newslettersListen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Sun, 30 Apr 2023 - 85 - Is nitrogen rate connected to surface area disruption?
March in Japan is the start of cherry blossom season, and on golf courses there is a lot of aerification. I've noticed that golf courses in Japan generally don't do as much surface area removal as is common in some other parts of the world. But the surfaces can still perform. I discuss this in this episode, and have a look at this post from the ATC blog: https://www.asianturfgrass.com/post/springtime-golf-course-maintenance-in-japan/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Fri, 21 Apr 2023 - 84 - All about the growth ratio equation for temperature-adjusted #ClipVol
I explained what the growth ratio is and showed the equation used to calculate growth ratio. This simple equation takes the measured clipping volume and adjusts it by the temperature. Jason Haines developed the growth ratio and has found it quite useful.
You can see that equation in this ATC blog post: https://www.asianturfgrass.com/post/the-growth-ratio-equation/
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Tue, 11 Apr 2023 - 83 - Growth ratio to predict clipping volume for any time of year
One of the common questions about #ClipVol is "what is a normal amount of clippings to get?" By using the growth ratio, it's possible to account for the temperature conditions through the year and from that calculate how many clippings would be normal for any day in the year.
The specific blog post discussed was https://www.asianturfgrass.com/post/what-should-my-clipvol-be/
You can see the growth ratio equation in this post: https://www.asianturfgrass.com/post/the-growth-ratio-equation/
Other links discussed in this episode include:
- growth ratio posts on the ATC site https://www.asianturfgrass.com/tag/growth-ratio/
- growth ratio posts on Jason Haines' blog https://fusariummy.blogspot.com/search/label/growth%20ratio
- the GP Avatar app https://www.asianturfgrass.com/post/the-gp-avatar-is-updated/
- turf videos organized by playlists https://www.asianturfgrass.com/post/turf-video-playlists/
- new seminar handouts section on the ATC site https://www.asianturfgrass.com/post/new-seminar-section/
- that information-packed 20 minute podcast with Chris Tritabaugh and Adam Moeller https://www.asianturfgrass.com/post/putting-green-measurements/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Sat, 01 Apr 2023 - 82 - Turfgrass growth rate and plant growth regulators with Bill Kreuser
Bill Kreuser joined to answer all the questions I could think of related to plant growth regulators (PGR). We discussed re-application intervals based on growing degree days for multiple turf species, and a lot of things related to growth rate and PGR use in general.
Some of the items we discussed include:
- The blog post getting the ATC Doublecut treatment, https://www.asianturfgrass.com/post/using-plant-growth-regulators-on-golf-course-putting-greens/
- Bill's GSR article from 2015, Effective use of plant growth regulators on golf putting greens: https://gsr.lib.msu.edu/article/kreuser-effective-4-3-15.pdf
- Reasor et al.'s article on Growing Degree Day Models for Plant Growth Regulator Applications on Ultradwarf Hybrid Bermudagrass Putting Greens: https://doi.org/10.2135/cropsci2018.01.0077
- Brown et al.'s article on Growing degree-days optimize trinexapac-ethyl reapplications on ultradwarf bermudagrass putting greens: II. Testing a reapplication schedule: https://doi.org/10.1002/csc2.20387
- The Greenkeeper App: https://www.greenkeeperapp.com
- Follow Bill Kreuser on Twitter at https://twitter.com/PGRBillRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Mon, 20 Mar 2023 - 81 - Cool-season turfgrass growth potential in Augusta in April and in November
In 2020, I looked at the temperatures in Augusta during the April Masters Tournament week, and the temperatures in November during the re-scheduled Masters dates. From those temperatures, I calculated the growth potential: https://www.asianturfgrass.com/post/turfgrass-gp-april-november/
For more about the temperature-based turfgrass growth potential, see https://www.asianturfgrass.com/tag/growth-potential/
Watch this episode at https://youtu.be/A_odktP6CAk
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Thu, 16 Mar 2023 - 80 - The USGA's GS3 for measuring putting green performance with Scott Mingay and Jordan Booth
I spoke with Scott Mingay and Jordan Booth from the USGA about the GS3 tool that measures green speed, smoothness and trueness of ball roll, and surface hardness of golf course turf.
Links:
Bobble Test video: https://www.asianturfgrass.com/post/teaching-the-bobble-test-video/
USGA Green Section website: https://gsshop.usga.org/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Sat, 04 Mar 2023 - 79 - Soil nutrient levels—especially in sand rootzones—can change rapidly
Soil nutrient levels might change more rapidly than you realize. This has implications for whether nutrients should be applied as fertilizer, or not. I showed data from an experiment I did when I was a graduate student in this blog post:
https://www.asianturfgrass.com/post/soil-nutrient-levels-change/
Jason Haines has written about a similar topic, and explained it perhaps more clearly than I have. I recommend his blog post on "Do you have enough?": https://fusariummy.blogspot.com/2023/02/do-you-have-enough.html
To read more about this experiment, see this chapter in my dissertation: http://archive.lib.msu.edu/tic/thesdiss/woods2006h.pdfRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Wed, 01 Mar 2023 - 78 - Five things to know about soil pH, and how to get the best fertilizer recommendations
I recommend keeping the soil pH between 5.5 and 8.5 when you are managing fine turfgrass. This episode explains why that is the recommended range, and also considers the recent GCSAA nutrient survey and the phenomenon of different N, P, and K application rates between those who soil test and those who do not.
The blog posts discussed in this episode are:
- https://www.asianturfgrass.com/post/a-soil-ph-chart-that-i-like/https://www.asianturfgrass.com/post/turfgrass-soil-testing-might-be-getting-better/https://www.asianturfgrass.com/post/putting-green-measurements/
Watch this episode at https://youtu.be/kRDPVAtTLroRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find turfgrass information and decision-making tools at https://www.paceturf.org/See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturfSee the ATC newsletters at https://subscribepage.com/atc_newslettersListen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Thu, 23 Feb 2023 - 77 - Soil test calibration and interpretation for turfgrass with Beth Guertal
Turfgrass soil test interpretation and the fertilizer recommendations that come from that have been highlighted as "arbitrary" and "based on other crops" and "needing more research." I suggest the #MLSN method as a way to bypass a lot of these problems, and Dr. Beth Guertal joined me to talk about this fascinating topic.
We discussed the post "Best judgment of the agronomist" which has a link to the #MLSN cheat sheet, plenty of quotes from the past 50 years about this problem, and links to plenty of information about making sure you apply just the right amount of fertilizer: https://www.asianturfgrass.com/post/best-judgment-of-the-agronomist/
A discussion about potassium with Doug Soldat is at https://youtu.be/ilPhk30NQlQFollow Dr. Guertal on Twitter at https://twitter.com/AUTurfFertWatch this episode at https://youtu.be/_xvII52YsZQRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find turfgrass information and decision-making tools at https://www.paceturf.org/See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturfSee the ATC newsletters at https://subscribepage.com/atc_newslettersListen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Sat, 18 Feb 2023 - 76 - Growth potential of turfgrass, the link to actual growth, and a further connection to N fertilizer with Bjarni Hannesson
Bjarni Hannesson has been using the temperature-based turfgrass growth potential (GP) for ten years. We discussed how he makes use of it in Iceland, and how the GP can be used to predict when and how much N fertilizer may be required to produce the desired growth rate.
We discussed this blog post, to begin with: https://www.asianturfgrass.com/post/which-more-effect-growth-light-or-temperature/
We also discussed the link to download slides and a handout from my 2013 presentation about GP and its link to N rate through probable growth: https://www.asianturfgrass.com/post/method-for-estimating-turfgrass-nutrient-requirements-iceland-report/
For photos of turfgrass and golf courses in Iceland, I've put a photo gallery here: https://www.asianturfgrass.com/post/turfgrass-in-iceland/
Watch this episode at: https://youtu.be/jSPJ0mGLZ7kRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Mon, 13 Feb 2023 - 75 - The temperature-based turfgrass growth potential (GP) in words — not numbers
The temperature-based turfgrass growth potential (GP) is a utility function that expresses the potential of temperature to affect shoot growth. Without going into too many numbers or the GP equation, I explained what GP is and how it is used.
I discussed these posts and shows about GP:
- https://www.asianturfgrass.com/post/gp-explained-photos/
Watch this episode at https://youtu.be/RK8hzJcep40Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find turfgrass information and decision-making tools at https://www.paceturf.org/See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturfSee the ATC newsletters at https://subscribepage.com/atc_newslettersListen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/
- https://www.asianturfgrass.com/post/gp-as-proxy-for-season-length/
- The ATC Office Hours episode with Larry Stowell about GP: https://www.youtube.com/live/oZgXv3ZaHkQ?feature=share
- PACE Turf climate appraisal forms with the GP equation embedded: https://www.paceturf.org/journal/climateFri, 10 Feb 2023 - 74 - Spots of excitement—snow mold spots—in an otherwise boring potassium experiment, with Doug Soldat
Doug Soldat is a professor in the soil science department at the University of Wisconsin-Madison. We discussed a recent photo he shared showing dramatically increased snow mold where K fertilizer was applied. Or perhaps it was dramatically reduced snow mold where K fertilizer was not applied.
- See the photo we discussed: https://www.asianturfgrass.com/post/k-fertilizer-and-more-snow-mold/
- Watch this episode at https://youtu.be/ilPhk30NQlQ
- Bier et al. article on K supply from topdressing sand: A long term evaluation of differential potassium fertilization of a creeping bentgrass putting green, https://doi.org/10.1007/s11104-018-3765-8
- If you are in the USA and would like to send your topdressing sand for an analysis of K content, you can send to Dr. Soldat at this address:Dept of Soil Science
Attn: Doug Soldat
1525 Observatory Dr.
Madison, WI 53706-1299Regarding samples, these have to come from the USA. Soils require an import permit to enter the USA and he doesn't have a permit for samples for this project. US samples only, please.
- Dest and Guillard on non-exchangeable K, Bentgrass response to K fertilization and K release rates from eight sand rootzone sources used in putting green construction, available at https://opencommons.uconn.edu/plsc_articles/13/
- The pH chart article we discussed is by Hartemink and Barrow, Soil pH - nutrient relationships: the diagram, https://doi.org/10.1007/s11104-022-05861-zRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Tue, 31 Jan 2023 - 73 - How to collect soil samples for #OM246 and #MLSN tests
Soil sample collection and handling procedures and recommendations and pitfalls. Plus three recommended newsletters.
Tue, 24 Jan 2023 - 72 - Turfgrass Twitter in 2022 with Paul Hurst
Paul Hurst, co-owner of GreensPro, joined me to discuss the Turf Twitter 2022 rankings and his 13th place finish in these highly competitive rankings. We ended up talking about music videos, karaoke, #MLSN, #ClipVol, and the transition zone.
Tue, 17 Jan 2023 - 71 - The 10 posts no one read last year with Joe Gulotti
Joe Gulotti joined me to discuss ten blog posts from the ATC blog that got the fewest views in 2022. It's easy to understand why some of these are on the list. A few deserve another chance to be seen. We discuss a range of topics, from maintenance Mondays to 19th holes.
Here's the list we were talking about. These are the ten posts no one read last year (in relative terms): https://www.asianturfgrass.com/post/ten-posts-no-one-read-last-year-2022/
Listen to Joe's "The Talking Greenkeeper" podcast at https://podcasts.apple.com/us/podcast/the-talking-greenkeeper/id1435947281
Watch this episode at https://youtu.be/bGzc31TwR24
Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find turfgrass information and decision-making tools at https://www.paceturf.org/See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturfSee the ATC newsletters at https://subscribepage.com/atc_newslettersListen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/Sun, 15 Jan 2023 - 70 - How much N is in two tenths of a pound? A lot, or a little?
A little bit of N is just that, a little bit, causing a small amount of growth. But with turfgrass being a perennial crop, those little bits of N eventually add up to a lot.
Thu, 12 Jan 2023 - 69 - Fourteen of my favorite turf photos from 2022
I discuss the interesting things I saw in 14 turfgrass photos in 2022. From zoysia to boats to traffic to tournaments to organic matter loss on ignition crucibles, this post discusses a range of topics.
Mon, 09 Jan 2023 - 68 - Planning forward, measuring backward, plus a year end miscellany
I explain how I like to use growth potential for planning, and then how I adjust based on measurements looking backward. This is also a year end miscellany, because I discuss five more ATC blog posts, including the top 10 posts of the year.
Fri, 30 Dec 2022 - 67 - Total organic material testing (OM246) to measure how much grass grew underground
Total organic material measured in the soil will include plant parts and thatch. Soil organic matter, on the other hand, excludes plant material. This episode discusses this distinction and shows the valuable information that can be obtained by measuring total organic material in addition to soil organic matter.
Tue, 06 Dec 2022 - 66 - Park Grass experiment photo gallery, fertilizers, and weeds in turfgrass
There's an interactive photo gallery with images from each of the Park Grass experiment subplots. I discuss this, and why it is worth looking at, and why dogma about turfgrass fertilization leads to more weeds.
Thu, 01 Dec 2022 - 65 - Is carbon the next frontier in fertilization?
A blog post from 2018 continues to be one of the most-read on the ATC site. It's about carbon fertilizer, and consists of quotes from Bryan and Tyler Hopkins' article on the topic. Their conclusion is "forget about fertilizing with carbon."
Sat, 19 Nov 2022 - 64 - Coring (hollow-tine cultivation) as a growth stimulator, plus estimated N mineralization from SOM
Is the real benefit of coring the growth stimulation that happens when turf is cored? Should soil organic matter reduction be considered a reason for or benefit of coring? Plus, how much nitrogen mineralization should be expected from soil organic matter.
Thu, 03 Nov 2022 - 63 - Overseeding timing, early, late, and optimum, by delta growth potential (GP) with Larry Stowell
Larry Stowell joined me on the ATC Doublecut to discuss winter overseeding of warm-season grasses with cool-season grasses, specifically by checking the temperature conditions by a delta (difference) between cool-season and warm-season growth potential.
Thu, 27 Oct 2022 - 62 - Why I recommend annual soil testing for professionally managed turfgrass grown in sand rootzones
One of ATC's soil testing clients had soil pH drop from 6 to 4.8 on tee surfaces from 2019 to 2022, with no soil testing in the three years between. For sand rootzones, I prefer annual testing because it allows one to catch these changes and adjust before things change too much.
Mon, 24 Oct 2022 - 61 - Big picture implications of #MLSN, SLAN, & SPF phosphorus recommendations, plus cumulative #ClipVol
I set myself a big challenge for this episode: to try to explain clearly what I was trying to communicate in a recent blog post about P fertilizer recommendations, and why the intermediate steps I showed might be confusing, but the bottom line result is actually simple and important. Plus, an underutilized way to look at #ClipVol data.
Sun, 16 Oct 2022 - 60 - The most common soil testing mistakes, and how to avoid them, with Doug Soldat
Soil testing can be a valuable tool, but to make use of the results most effectively, one needs to avoid common mistakes. Doug Soldat from the University of Wisconsin joined me to talk about the recommended way to use soil tests (soil nutrient analyses) for turfgrass.
Tue, 11 Oct 2022 - 59 - An alternative reference for frost delays with Jim Huntoon
In some parts of the world, traffic on frosted turf is forbidden. In other parts of the world, traffic is allowed, perhaps even encouraged. Jim Huntoon and I discussed this phenomenon and frost delays in general.
Thu, 06 Oct 2022 - 58 - Using the turfgrass growth ratio to adjust for site-specific conditions with Jason Haines
The turfgrass growth ratio (speedo) was developed by Jason Haines. It's a ratio of actual growth (grass clippings) divided by a temperature-adjusted standard amount of expected clippings. This simple ratio turns out to be surprisingly useful. We discussed this and related turf management issues.
Wed, 28 Sep 2022 - 57 - Why soil samples should be air dried before sending to the lab
The procedures of soil sample collection and handling before sending to the lab are important. Reduce unknowns and variability in the test results by drying the samples prior to sending them to the lab. Also, collect samples to a consistent depth. And let the machines at the lab remove thatch and verdure.
Mon, 26 Sep 2022 - 56 - Turfgrass in Iceland, frost, 24 hours of golf, and #MLSN with Bjarni Hannesson
Bjarni Hannesson joined me on a late summer day from Reykjavik to discuss turfgrass management in Iceland and the surprising number of golf rounds played at courses in southwestern Iceland, how he handles frost delays, and whether #MLSN works in such a cold environment.
Sun, 18 Sep 2022 - 55 - Grass color, consistency, and the oldest course in Thailand with Joe Gulotti
Joe Gulotti joined me to discuss another blog post that bombed, and we ended up discussing mango drinks, birdie dances, consistency in playing conditions, and turf color.
Thu, 15 Sep 2022 - 54 - Mowing stripes on tea, 18 turfgrass videos about greenkeeping in Japan, plus best lift access snow
I describe mowing stripes on tea trees (bushes), explain what I put in 18 videos about greenkeeping from a recent trip to Japan, and count the number of days with snow cover in Hokkaido's two largest cities.
Mon, 12 Sep 2022 - 53 - Manganese deficiency, Doublecut show stats, and my New Zealand presentation highlights
I discussed whether 11 ppm soil Mn might be deficient, took a look at Doublecut show statistics to see the countries with the most listens plus compared the views on YouTube to the podcast listens, and I went through highlights of my presentations in New Zealand.
Mon, 05 Sep 2022 - 52 - Drought performance of warm-season grasses plus a KBC Augusta data review
I reviewed the data I collected at the KBC Augusta tournament including green speed and firmness, the bobble test, and soil water content, along with discussion of research into warm-season grass performance during drought, and the standout (in a bad way) case of zoysia.
Tue, 30 Aug 2022 - 51 - Managing seashore paspalum "dry and lean" with Jon Wall, plus tournament prep in Vietnam
Jon Wall joined me from Danang on the eve of hosting the BRG Open tournament to discuss seashore paspalum.
Sun, 28 Aug 2022 - 50 - Zoysia and bermudagrass green speed live from the KBC Augusta tournament in Japan
I discussed zoysia and bermudagrass green speed while broadcasting from the maintenance office of Keya Golf Club in Fukuoka, host of the KBC Augusta tournament on zoysia putting greens.
Wed, 24 Aug 2022 - 49 - A lot more than the average tournament, sodium/potassium ratios in soil, & golf rounds data
I recorded this episode at the golf course maintenance facility at Keya Golf Club in Fukuoka, Japan, at the start of the 2022 KBC Augusta tournament. I talked about what makes this such a special tournament, about Na:K ratios, and about golf rounds (and days closed for maintenance).
Mon, 22 Aug 2022 - 48 - Posts no one read (but I wish they had): grass on the Kumamoto city tram lines with Joe Gulotti
There's grass on the Kumamoto City tram lines, mown with the most incredible (and expensive) reel mower I've every seen. Joe Gulotti joined me to discuss why this was one of the posts with the fewest views in 2019.
Sun, 14 Aug 2022 - 47 - Golf course architect Paul Jansen and I debate the best golfing destination in Asia
Paul and I discussed a number of locations around Asia including Da Nang, Thailand, Hokkaido, Sri Lanka, Myanmar, Indonesia, and the Philippines, for their relative merits as golfing destinations.
Sun, 07 Aug 2022 - 46 - PACE Turf, turf textbook publishing, and the International Turfgrass Society w/ John Kaminski
John Kaminski joined me to discuss PACE Turf's information service, the turf textbook publishing industry, and more.
Sun, 31 Jul 2022 - 45 - Frank Rossi and I discuss what I've called my "least favorite experiment ever"
Frank Rossi from Cornell University joined me to discuss an experiment he conducted (and I helped with a little bit) in the early 2000s. We discuss the performance of the control treatment, fertilizer choice, sustainability, and take home messages from the experiment.
Wed, 27 Jul 2022 - 44 - Andrew Thomson on remote courses in Japan, hickory golf, links turf, and "champagne golf"
Andrew Thomson joined me from Itoshima, Japan to discuss the type of golf courses one can find on remote islands in Japan, such as the spectacular Hirabaru at Ukushima Island, and the 5 hole links beside the sea at Ojika.
Tue, 26 Jul 2022 - 43 - Dollar spot and a predictive model, fertilizer recommendation survey, and light that's "missing"
I discuss seeing a lot of dollar spot and checking the probability of a disease epidemic, show the results of a fertilizer recommendation survey, and discuss a ranking system for locations where warm-season grasses grow based on missing light.
Thu, 21 Jul 2022 - 42 - Achieving the desired turf surfaces by thinking backwards (or why reactivity can beat proactivity)
I discuss the idea that being reactive to current turf conditions---working backwards from the conditions to the work that should be done---offers substantial advantages over a proactive and scheduled approach to turf management.
Sun, 17 Jul 2022 - 41 - Zoysia on putting greens? Why?
Have you ever putted on zoysia greens? Wait, zoysia can be used on putting greens? Yes, it can be, and in many cases it makes a fine choice of grass. However, it has a distinctive roll, and this episode discusses when and why one might use zoysia on greens, with special guest Chris Chase, CGCS.
Sun, 10 Jul 2022 - 40 - Zoysia seedheads and pitchmarks that last
I discuss two blog posts---one is pitch marks and what I know about reducing damage from them. The other is zoysia seedheads, specifically on manilagrass, and the interesting phenomenon of year round seed production in short days and high temperatures near the equator.
Sun, 03 Jul 2022 - 39 - Trees, turf, and tropical tournament golf
Chris Chase joined me to discuss the types of grass that work in tropical conditions when there is a combination of high temperatures, cloudy weather, and tree shade. We discussed a lot of different grass types.
Sun, 26 Jun 2022 - 38 - Soil and water management: 3 problems (salinity, sodium hazard, & deficiencies), with solutions
I discuss three primary problems that may occur with irrigation water and soil. These are chemical problems that one might not be aware of without testing. Specifically, I discuss salinity, sodium hazard, and nutrient deficiencies, presenting the problems and explaining a solution for each.
Wed, 22 Jun 2022 - 37 - Urea as putting green fertilizer for complete control of tournament greens
Andrew McDaniel and I discussed complete control of putting green fertilizer with urea, including how to make the applications, when to worry about burn, and how he dissolves the products.
Sun, 12 Jun 2022 - 36 - 4 tools to measure putting green firmness
This looks at a classic post from a few years ago in which I discussed four tools used to measure surface hardness (firmness) of golf course putting greens. Andrew McDaniel joined me on this episode to provide more insight into these tools.
Sat, 04 Jun 2022
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