Measure exact topdressing effect, and requirement, by checking total organic matter by depth.

The inexorable rise of soil organic matter

One of the many valuable things I utilize from OM246 testing is what I call the organic matter accumulation rate. I’m actually referring to the net accumulation rate—how the total organic material in the rootzone would change if no topdressing had been applied.

Total organic material accumulation rate and sand topdressing requirement

When the total organic material is known at time A and at time B, the accumulation rate can be calculated. By accounting for the sand that was applied between time A and time B, another accumulation rate can be calculated: the organic matter accumulation rate independent of sand application.

Sand topdressing by exact depth: how to work it out

Today I explained the same calculation about sand topdressing for the third time, so I need to write a blog post on this topic. This is following the method of David Robinson, who says when you’ve written the same code 3 times, write a function; when you’ve given the same advice 3 times, write a blog post; and when you’ve done the blog post 3 times, write a book.

Topdressing frequency on golf course putting greens in Japan

A recent conversation about putting surfaces in Japan led to discussion of topdressing amounts and frequency. The Greenkeeper 2018 has course maintenance summaries for 17 courses in Japan. I mapped the locations of those courses by zip code.

Sand, leading to more growth, needing more sand, leading to more growth, needing more sand

Frank Rossi and Dan Dinelli had an interesting conversation on Turfnet Radio. I learned a few things, and I even agree with some of what they discussed. But not all of it.