Asian Turfgrass Center

Monthly Turfgrass Roundup: August 2018

Topdressing, more about topdressing, all kinds of videos, growth rates, wetting agents, tournament golf & superintendent recognition, history, one wish, and a lot more

Posted on September 13, 2018

After torrential rain, does all the potassium leach? Doug Karcher has the best wetting agent photos. It’s fun to evaluate wetting agent trials in late summer. No plot plan needed to pick out untreated controls. pic.twitter.com/2IqmOho1TJ— Doug Karcher (@uarkturf) August 28, 2018 Golf telecasts in Japan—at least the KBC telecast—prominently... [Read More]

roundup

Nitrogen, rain, and starting point estimates

Estimating the N mineralization from soil organic matter based on temperature and soil water content

Posted on September 12, 2018

Regular readers of this blog will be familar with some previous attempts to estimate the N mineralization in turfgrass soils. There was this from 2010, which I wrote about in 2015 saying “I wouldn’t explain it this way again.” What I’d done then was estimate a maximum of 4 g... [Read More]

Airplane fuel requirements, soil test calcium, and MLSN

Posted on September 7, 2018

Grant Saunders asked a series of questions about the quantity of nutrients required in the soil, using calcium as an example. One can see that full discussion here. When he asked this question, I thought the clearest way to answer it would be with a blog post. “So if a... [Read More]

Piper and Pebble Beach

Posted on August 20, 2018

Last week I was in California for the U.S. Amateur Championship at Pebble Beach. I was running on a trail in the Del Monte Forest on Saturday when I came to an open area called The Meadow. Beside the trail there you can see this marker, noting that the trail... [Read More]

turf tourism

A soil temperature turfhack

The soil temperature at 5 cm (2 inch) depth is almost always between the day's low and high air temperature.

Posted on August 10, 2018

It’s always a good idea to know what the soil temperature is. One can measure it, or one can be confident that the average daily soil temperature close to the surface (5 cm, or 2 inch depth) is higher than the daily low temperature, and lower than the daily high... [Read More]