Posts

It’s called A Short Grammar of Greenkeeping. The book is not completely new material. It is based on the 14 articles I wrote in a series for GCM China, which I realized make a short grammar.

I’ve shared some charts of photosynthetically active radiation (PAR) as it changes through the day and through the year at different locations. For example, this is the PAR at Corvallis for each day of 2015.

This is an article I’ve recommended before, and share again here. It is Purchasing new products and technologies: an ethical and common-sense approach by Dr. Robert Carrow. Dr. Carrow explains a procedure for golf course superintendents who want to stay on the cutting edge of advancements to make “wise decisions about purchasing new products/technologies.

For a while, this topic was coming up every few months. Here’s an example from an e-mail inquiry. I paraphrase the words here, but keep the punctuation intact, and I omit course, company, and superintendent names:

Someone asked me at the Northern Green Expo if the temperature-based growth potential (GP) and temperature-based growing degree days (GDD) are comparable. They sort of are, with a couple of exceptions.

I received this inquiry by email: When looking at water quantity for a new golf course, you have to determine how much water is needed obviously so what I want to know is

I taught five seminars at the Northern Green Expo in 2016. The (New) Fundamentals of Turfgrass Nutrition Nutrient Use by the Grass and Nutrient Supply by the Soil Calculating the Fertilizer Requirement for any Turfgrass, Anywhere

This chart ( download at full size ) shows the average photosynthetic photon flux density (PPFD) for each hour of 2015 at Tokyo. The daily light integral (DLI) is the number written in black at the top right corner of each facet in this chart.

I made a map of all the flights I took in 2015.1 After seeing the map, I scrolled through my photos from these places. It was an extraordinary year for studying grass around the world.

After I wrote about no problem DLI levels, Brandon Horvath asked if I could get DLI for some cities in Tennessee. For a description of how I made the calculations, see Estimating daily light integral (DLI) in 4 Tennessee cities.