The ATC Doublecut with Micah Woods

When the cool-season growth potential (GP) is lower than the warm-season GP, the difference between them (the ΔGP) will be negative. In this episode, I discuss ΔGP and three different ways to think of summer duration.I discussed this blog post: https://www.asianturfgrass.com/post/summer-assessment-with-delta-gp/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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

I wondered what NotebookLM could do, so I created a couple notebooks. One has the title “Global Soil Survey,” and in that notebook I uploaded articles and documents I’ve written about MLSN and the GSS. I let the model generate a few different audio summaries of this project. And I uploaded the text to A Short Grammar of Greenkeeping, and I let the model produce an audio summary of that book.Blog post: https://www.asianturfgrass.com/post/grammar-greenkeeping-turfgrass-growth-optimal-playing-surfaces/Google's NotebookLMGlobal Soil SurveyMLSN cheat sheetPACE Turf If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

Grant Saunders is the course superintendent at Hamilton Golf Club in New Zealand. He has successfully overseen a green species conversion from Poa annua to browntop bentgrass (Agrostis capillaris). We discussed that, and the role of OM testing, and sand topdressing, and soil pH, and greenkeeping in New Zealand.Some links include:https://www.asianturfgrass.com/post/accumulation-soil-organic-material/https://hamiltongcmaintenance.blogspot.com/2018/06/poa-vs-browntop.htmlA "Cart Rides with Micah" episode from Hamilton Golf Club https://youtu.be/dWj-MO4UBW4?si=oF-rtC_BWTPEYZmBhttps://www.asianturfgrass.com/post/gp-as-proxy-for-season-length/https://www.asianturfgrass.com/post/new-mlsn-cheat-sheet/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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

When you know the rate at which organic material is accumulating in the rootzone, you can adjust sand topdressing rates with more precision. You can also start to check how any changes in maintenance can have an effect on the accumulation rate.The blog post discussed is this one: https://www.asianturfgrass.com/post/inexorable-rise-soil-organic-matter/The Shiny app to calculate the accumulation rate is: https://asianturfgrass.shinyapps.io/om246/You can learn all about OM246 tests at https://www.asianturfgrass.com/project/om246/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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

T-Jay Creamer is the golf course superintendent at Olympic View Golf Club in western Canada. He joined me to discuss tournament golf maintenance and the grammar of greenkeeping.We discussed this ATC blog post: https://www.asianturfgrass.com/post/two-weeks-in-august/T-Jay's Substack newsletter is https://ovgrounds.substack.com/He explained the green speed and smoothness annual summary in this post, discussed at the end of our podcast: https://ovgrounds.substack.com/p/chasing-the-numbers-2024-greens-speedUSGA video with Chris Tritabaugh about pinpoint precision at the U.S. Amateur https://youtu.be/FA9YLlKsdFERead 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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

A month ago Joe Gulotti and I walked the fairways and greens of the Montchanin Course at Dupont Country Club. I wrote a blog post about that, and we discussed my visit in this episode.Blog post: https://www.asianturfgrass.com/post/a-visit-to-the-talking-greenkeeper/The Talking Greenkeeper podcast: https://podcasts.apple.com/us/podcast/the-talking-greenkeeper/id1435947281Read 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/ If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

You can sometimes, perhaps more often than you would think, find soil under good turf to have lower nutrient content than does soil under poor quality turf. In this episode, I explain why that is, what the implications of this phenomenon are, and what you can do about it.This blog post has all the details on the turf (and soil) paradox: https://www.asianturfgrass.com/post/turf-paradox/Henry Qu and I discussed learning, Bayesian analysis, and more in this engaging conversation: https://youtu.be/o4Y4xJt0stU?si=2jQevp6CqKPWR1giRead 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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

Independent turfgrass researcher John Dempsey, Ph.D., joined me to discuss evaluating treatment effects and the importance of having a good control. We talked about diseases, nutrition, and this blog post:https://www.asianturfgrass.com/post/problem-with-the-controls/Find John on X at https://x.com/J_J_DempseyRead 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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

Dr. Henry Qu, partner and data scientist at Oxbridge Economics, joined me to talk about data analysis, and statistics, and how to try to learn things in turfgrass science. We discussed NTEP, posterior distributions, disease resistance, ANOVA, total organic material expectations by species, the process of learning, and much more.ATC blog post about surface organic material of putting greens: https://www.asianturfgrass.com/post/total-organic-matter-surface-putting-greens/Henry's 2023 CSSA presentation "On the Data Analysis of Small-Plot Field Trials in Turfgrass Science:" https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/148936NTEP, the National Turfgrass Evaluation Program: https://ntep.org/Oxbridge Economics: https://www.oxbridge-econ.com/aboutRead 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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

Jon Wall, golf course superintendent at Shanqin Bay, joined me to discuss doing more work to make grass better, rather than doing less. And also about what I'd want everyone to do, which is doing the right amount of work for your property.We talked about many things, starting off with:Better turf conditions with more intensive maintenance blog post: https://www.asianturfgrass.com/post/doing-more-work/Our previous conversation about sustainable turfgrass management: https://youtu.be/hXtqiYOOq1E?si=8IVV-t06JVTqcfo6Infiltration rate: https://www.asianturfgrass.com/post/why-i-dont-worry-about-infiltration-rate/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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

It's summer in the northern hemisphere, and the two items discussed in this episode provide guidance on managing turf when it has to survive through heat stress.From the ATC website, a 12 point list: https://www.asianturfgrass.com/post/catching-up-on-reading-heat-stress/From PACE Turf, the Heat Kills document: https://www.paceturf.org/member/Documents/0108.pdfRead 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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

Carl Schimenti from Cornell University joined me to discuss intro to #MLSN explanations vs. using MLSN the way it is designed to be used. We also talked a lot about ball roll assessment using the #BobbleTest, and the USGA GS3 ball, and other methods.MLSN project page: https://www.asianturfgrass.com/mlsn/Daniel Palin with the MLSN test on The Talking Greenkeper: https://podcasts.apple.com/us/podcast/daniel-palin/id1435947281?i=1000647459615Blog post on one additional chatter of snaking event in three rolls: https://www.asianturfgrass.com/post/one-chatter-or-snaking-event-in-every-third-ball-roll/Linde et al. on "Comparing Three Methods to Measure Putting Green Trueness" https://doi.org/10.2134/itsrj2016.05.0332My video on How to measure the smoothness and trueness of golf course putting greens? https://youtu.be/Fg_aDTB-O10?si=ZA4rgU2A1SLACrJ5Bobble test rating scale: https://www.asianturfgrass.com/post/bobble-test-rating-scale/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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

Soil P, pH, and salinity are a few things that likely vary by depth in your rootzone. I've started recommending that 20% of putting greens tested be done with a sample divided at the 5 cm depth. Send the lab a 0-5 cm and 5-10 cm depth sample from that green, rather than the standard 0-10 cm depth sample. I discussed this blog post: https://www.asianturfgrass.com/post/reconstructing-soil-p-from-disassembled-soil-samples/The MLSN page on the ATC site: https://www.asianturfgrass.com/mlsn/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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

Maggie Reiter joined me to discuss how the start (and end) of the turfgrass maintenance season might be predicted. When is spring green-up? When does the season end? We discussed, and showed charts of growth potential and temperature, from this post: https://www.asianturfgrass.com/post/maps-of-average-temperatures-in-the-usa/The Sunday Lawn Care plansWe discussed the article "An examination of turfgrass species use on golf course putting greens" by Brosnan et al., which you can read, and see the maps of species use, at: https://doi.org/10.1002/cft2.20160The 15th International Turfgrass Research Conference will be held in July 2025 at Karuizawa, Japan: https://itrc2025.turfsociety.com/See our previous conversation about ecoregions at: https://www.youtube.com/watch?v=TP3XmNyDN6sBlack sand topdressing in Iceland to increase temperature: https://www.asianturfgrass.com/post/turfgrass-mystery-the-case-of-the-greener-grass/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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

Bill Kreuser, Ph.D., president of GreenKeeper, joined me to discuss the new water resource planning tools in GreenKeeper, along with disease risk, PGRs, soil surfactants, and weather data.See more about these tools at the GreenKeeper app: https://www.greenkeeperapp.com/Irrigation posts at the ATC website: https://www.asianturfgrass.com/tag/irrigation/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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

I discuss small plot university research with fixed treatments vs. golf course and sports turf maintenance with treatments that vary, and consider which results we should trust more. I also discuss the bobble test after 270 rounds, mention that core sweepers are a nice machine, and explain how I estimate N harvested in creeping bentgrass clippings.Posts discussed and relevant links include:https://www.asianturfgrass.com/post/ball-roll-after-270-rounds/Short bobble test video with T-Jay Creamer: https://youtu.be/Y2Fbw8Ks-gEATC2x episode with T-Jay about management of the greens: https://youtu.be/NJwc7XJQRGkBobble test rating scale: https://www.asianturfgrass.com/post/bobble-test-rating-scale/MSU Turfgrass Information File database: https://tic.msu.edu/databasehttps://www.asianturfgrass.com/post/green-sweepers-that-work-beautifully/Cleaning aerification cores the easy way in Japan: https://youtu.be/yv26e9rqwBwhttps://www.asianturfgrass.com/post/nitrogen-harvested-in-clippings-calculation-update-for-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/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

I describe what  we can learn from looking at five years of Mehlich 3 soil test phosphorus results from golf course putting greens, how to calculate the turfgrass speedo in a standard way, rather than in a chaotic way, and recommend an episode of the Cornell Turfgrass Show that asks if soil testing is the answer to all your problems.These are the links to posts and videos mentioned in the show:https://www.asianturfgrass.com/post/mehlich-3-soil-test-p-in-sand-rootzones/https://www.asianturfgrass.com/post/spring-growth-flush/https://www.asianturfgrass.com/post/soil-testing-cornell-turfgrass-show/https://youtu.be/LHEs7vT2hfURead 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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

T-Jay Creamer joined me to discuss bentgrass & Poa annua (bent-Poa) management with a surprisingly low annual N rate, almost no use of PGRs, and no aeration (other than occasional needle tining) for more than two years. The results surprise me, and they may surprise you too. We discussed this blog post about the turf speedo: https://www.asianturfgrass.com/post/turf-speedo-looks-like-this/Follow T-Jay on X at https://x.com/TJayC17Read 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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

In this episode, I discuss sixteen year old bentgrass greens that have also gone sixteen years without  P fertilizer. The greens are also free of Poa annua. Then I discuss how fertilizer recommendations made from soil tests are a lot more precise if the time duration over which the fertilizer is being recommended is considered explicitly. And I explain why, when measuring #ClipVol, you will get value from annual totals too.P & Poa with Bob Raley is this post https://www.asianturfgrass.com/post/no-poa-after-16-years/ and this video https://youtu.be/s90tIstilbwThe time component of #MLSN post is https://www.asianturfgrass.com/post/the-time-component-of-soil-test-interpretation/The annual clipping yield post is https://www.asianturfgrass.com/post/the-annual-and-year-to-date-yield/ and links to this video https://youtu.be/8DdekceL9jERead 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/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/

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/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter If you'd like to attend the 15th International Turfgrass Research Conference in Japan, here's a direct link to the conference website: https://itrc2025.turfsociety.com/