Catching up on my reading, heat stress edition

I’ve been writing a monthly column for Golf Course Seminar (ゴルフ場セミナー) since May of 2008. The articles are usually 2 pages. I wrote a couple 4 page articles when マイカの時間 The BOOK was published last year.

A greenkeeping discussion

I had an open discussion today with a group of greenkeepers in Japan. We talked about a lot of things – bentgrass in summer, irrigation, fertilizer, organic matter management, roots, etc.

Phosphorus deficiency symptoms in the control plots

After last week’s post about the soil test levels where P deficiency symptoms were seen, Paul Johnson wrote to remind me about another experiment: “This is always a topic of interest to me, beginning with the study I did in the early 2000s.

Can we guess how low the P is here

Every time I see a photo like the one shared by Ben Pease last month, I get really curious to know the soil test levels of the element. Phosphorus deficient bentgrass.

The two green system usually means there are two bentgrass greens per hole

The idea that golf courses in Japan with the two green system have a summer green and a winter green is not quite correct. Nor is the two green system used exclusively with one warm-season grass green and one with cool-season grass.

The Winter’s Tale

Doug Soldat has photos showing more snow mold where potassium fertilizer was applied. Where potassium was not applied, there is less snow mold. Tried something new this year. Top left high K for six yrs, but no K after Aug 2016.

How to lose 120 million yen with frost delays

I’m bombarded at this time of year with reminders, notices, descriptions, and articles telling me about the importance of frost delays. Apparently, frost delays are essential for the health of the turf.

Fall potassium and winter traffic on a bentgrass green

Play on frosted bentgrass greens in Japan is not uncommon. Winston Mirmow’s thesis on Fall potassium fertilization and winter traffic effects on a creeping bentgrass putting green has some surprising results.

Does soil water content affect nighttime soil temperatures in summer?

I was wondering what the effect was. I expected a 1 or 2 °C decrease in nighttime soil temperature in drier soils, compared to soils with more water. I didn’t find it.

Every spring when the snow melts

I look forward to some photos from Doug Soldat. For many years, he’s had some fascinating photos to share of snow mold on creeping bentgrass. And each year, there was more snow mold where potassium fertilizer was applied, and less snow mold where potassium wasn’t applied.