The ATC Doublecut with Micah Woods

My Short Grammar of Greenkeeping book is one of the required books for turf class at Horry-Georgetown Technical College in South Carolina. Professor Jim Huntoon joined me to discuss the book, why he …

Janne Lehto from Hirsala Golf in Finland attended the 15th International Turfgrass Research Conference (ITRC) in Japan. We discussed the heat and humidity in Japan during summer, saunas, his golfing …

John Forrest and Jeff Austen joined me from Western Australia to discuss layers in the rootzone, the educational system and apprenticeships, and sand.

• We looked at photos of layers in this post: https…

How do you compare sands to show to what degree one is finer or coarser than another? I've been trying to figure out an easy way to visualize this with comparison to reference materials. Adam Moeller…

John Emerson is an extension agent for the University of Delaware who has completed a statewide soil sampling project from good performing turf across the state. We talked about this project, and abo…

The D50 is a value that represents the median particle diameter in a sand. I calculated the D50 for 302 sands from around the world, and 15% of them are finer than the limit defined by the USGA Recom…

I explain that moving from full sun to tree shade reduced photosynthetically active radiation by about 80%. I show an app, and a PACE Turf document, that will allow you to find both PPFD and DLI no m…

John Petrovsky is manager of USGA Green Section Education. He is also the host of the USGA Green Section podcast. We discussed a recent episode about GvX that had an especially insightful quote from …

Geoff Fenn and I discussed the use of the turfgrass growth potential (GP) in the UK, optimum temperatures, the GvX, clipping volume, and more in this episode that started with a look at this blog pos…

I discussed some green speed and green firmness data from measurements made at the Sky RKB Ladies Classic tournament, and I explained why the geometric mean rather than the arithmetic mean can be esp…

In this episode I picked some of my favorite photos from 2024, and I remembered what I learned from them. From roots, layers, OM246, zoysia greens, and drought, to loupes, turf farms, compost, and be…

There have been a lot of conversations about soil water content and surface hardness (firmness). I discuss some measurements that I have made, and suggest some of the old posts on the ATC website tha…

Jason came up with the GvX idea in a flash of inspiration that he describes here. This is the actual growth of the grass compared to the expected growth of the grass, and it has surprising practical …

Achieving the lowest possible #OM246 total organic material value is not desirable, because the living plant material is part of the OM measured with this method. 

• I discussed this post: https://www.a…

A common way to calculate average daily temperature is to take the sum of the daily maximum and daily minimum temperatures, and to divide by two. A better statistical approximation of the average tem…

Joe Gulotti joined me to discuss his new job, The Talking Greenkeeper, and the ten posts on the ATC website that no one (practically) read in 2024.

• This is the post that lists all the "bombs:" https:/…

Although turf research is often done with fertilizer treatments applied at constant rates and on a fixed calendar schedule, that way of supplying nutrients seems strange to me now. I explain why in t…

I recommend 4 podcast episodes and one useful app that calculates sand topdressing amounts, then quickly discuss the top 10 new posts from the ATC website in 2024.

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Green speed varies because of many factors. One of those factors is clipping volume. I discuss that relationship and give some advice for those getting started with clipping volume and wanting to kno…

Did you know there was a time when up to to 2 lbs N per 1000 square feet per growing month, the equivalent of 100 kg of actual N per ha per month, was a standard recommendation for putting green turf…