Posts

A previous post showed photosynthetically active radiation (PAR) data in units of daily totals—the daily light integral (DLI). That post included a chart with a locally smoothed regression line through it.

Some of you saw this film at its first screening during BIGGA’s National Regional Conference. On 8 December, the “Still Learning” film is coming to screens worldwide. And now, here is the official trailer.

I’ve been using the NASA POWER agroclimatology data for a few projects. I get the data using the convenient nasapower R package by Adam Sparks. There is also a web-based map data access viewer.

I collected a lot of soil samples this month. My standard procedure after collecting samples is to air dry them before sending to the lab. This is a dried sample from the top 2 cm (0.

Playability is what it is all about, isn’t it? At least for putting greens, one wants to have surfaces upon which the ball rolls at a certain pace, and which have a firmness that is appropriate for the conditions.

I’ve seen a lot of highways in Thailand. Highway medians are sodded with manilagrass (Zoysia matrella) as a matter of course (more about the cost of that below). I’ve seen some impressive vistas of this work in past years, but for safety reasons haven’t been able to get any photos.

I’ve recommended these before, and having found myself repeatedly suggesting the Wisconsin clipping tracker template (read about this at the UW site1) and the Data organization in spreadsheets article. This post is a bookmark for that topic.

On February 28, I took Wana—a fine-bladed putting green type manilagrass—rhizomes and cut to a two node length. Then I planted these cut rhizomes, each with two tiny plants on them, in the center of sand-filled pots.

These are the predicted distributions and percentiles of total organic matter in the surface 2 cm (0.8 inches) of warm-season grass putting greens. I include a plot for predicted organic matter of a random green of an unknown species.

This is a time of year when there is a lot of sand going down on putting greens, and sometimes a bit of coring too. The purpose of all this work?