Environment

These are the slides shown in the four presentations I made at the 2025 Danish Greenkeepers Conference. I’ve also included links to articles, calculators, and information discussed during the event.

Episode 18 of ATC Office Hours covers the basic greenkeeping practices that are effective in Denmark on pesticide-free courses. With guests Thomas Pihl, Mads Andersen, and Martin Nilsson, we answered live questions from the audience during this episode too.

I read the environmental section of the New York Golf Economic & Environmental Impact Report. More than one out of every five golf courses in the state responded to the survey, with a total of 154 responding courses.

In 2013, I was a co-author on this article with Drs. Wendy Gelernter and Larry Stowell. I encourage you to read the article now, if it’s your first time to come across it, or to read it again if you haven’t perused it recently.

Yesterday I responded to two questions related to carbon emissions associated with electricity generation. This was part of a broader discussion started by Jason Haines about small electric autonomous mowers.

Jason Haines has written recently about The future of robot mowers today and I recommend having a read of that post for more insight, and some videos of these types of machines.

In the latest World Golf Report, I came across a link to Giles Morgan’s post on Sport – it’s all about Darwinning. This was a broad discussion of sports thriving – or not.

A fine-bladed manilagrass growing faster than Tifeagle bermudagrass. I’ve written about zoysia growing faster than bermuda. Mike Richardson asked: so, the real question…is that better? “Slow growing” has always been one of my favorite traits of zoysia…

The MLSN guidelines were developed from a large dataset of soil tests collected from good-performing turf. You’re probably familiar with the MLSN guideline as a minimum level, with fertilizer recommended to make sure the soil doesn’t drop below the guideline.

This is no secret among turfgrass scientists—there isn’t a lot of good justification to support what we call conventional guidelines for soil nutrients in turfgrass. And by that, I mean the conventional guidelines are broken.