You can expect soil organic matter to be 5% nitrogen, and you can expect from 1 to 4% of that organic nitrogen to mineralize in one year. You can also calculate estimated daily mineralization and sum it to get weekly, monthly, and annual totals. The blog post discussed is: https://www.asianturfgrass.com/post/estimating-nitrogen-mineralization-an-example/ Subscribe to the Turf Without Borders podcast: https://turfwb.asianturfgrass.com/subscribeRead more about all kinds of turfgrass topics at...

This episode introduces multiple experiments that have demonstrated a link between rapid measurement of clipping volume and the clipping yield. Clipping yield is typically expressed as dry weight per area. Links to the articles discussed are in the blog post. Blog post on Converting Clipping Volume to Dry Weight: https://www.asianturfgrass.com/post/converting-clipping-volume-to-dry-weight/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at...

Leah Brilman, Ph.D., is the Director of Product Management & Technical Services for Seed Research by DLF. We discussed velvet bentgrass, creeping bentgrass, and browntop bentgrass, along with seed production and grass performance. The bentgrass posts at the ATC website are at this link: https://www.asianturfgrass.com/tag/bentgrass/To see the word cloud with all the most frequent tagged topics, go to: https://www.asianturfgrass.com/#tagsI've spoken about browntop bentgrass management in...

Andrew McDaniel has been watching webinars to get education points, and some of these have been about management of soil organic matter on putting greens. We discussed a particular article and whether that method is something that seems reasonable today. The blog post we discussed is https://www.asianturfgrass.com/post/a-chance-to-update-my-advice/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at...

Here are four specific things to look at with total organic material by depth (#OM246) test results. The blog post I discussed is this one: https://www.asianturfgrass.com/post/om246-reports-explained/The video in that post is https://youtu.be/wUtpJC1YPU0 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...

Matteo Serena is the Senior Manager of Irrigation Research and Services for the USGA. We discussed drip irrigation, growth regulators and soil surfactants, water use, overseeding, and bermudagrass vs. zoysiagrass water use. We discussed this ATC blog post: https://www.asianturfgrass.com/post/zoysia-and-water-use/ We also discussed these articles: -...

I checked the top episodes, discussed turf terminology, and discussed the 2025 GCSAA Outstanding Contribution Award winners Dr. Wendy Gelernter and Dr. Larry Stowell. The four posts discussed in this episode are: https://www.asianturfgrass.com/post/the-turf-gvx-growth-versus-expected/https://www.asianturfgrass.com/post/seven-minutes-of-outstanding-contributions/https://www.asianturfgrass.com/post/football-seminar-in-bangkok/https://www.asianturfgrass.com/post/top-atc2x-episodes/ Read more...

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...

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:...

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...

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...

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:...

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/id1435947281 Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at...

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:...

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_Dempsey 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...

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...

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:...

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...

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...

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...

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...

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...

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...

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...