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.
The Brede equation is essential to my work. I often use the stimpmeter to measure the ball roll distance (green speed) of putting greens. But there's a problem. It can take a long time to find an area flat enough to make the measurement. On some greens, there is so much slope that one cannot make an official measurement.
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.
Last November I saw a creeping bentgrass nursery in Japan. The nursery had been fumigated to kill seeds in the soil before the bentgrass seeds were planted.
I was surprised to see, scattered across the nursery, plants with big leaves that clearly were not creeping bentgrass.
A few years ago Blake Meentemeyer and Brian Whitlark wrote about fertilizer in the Green Section Record. I’ve recommended this article before, in a post on the Viridescent blog. I highlighted in that post a case study from the article—a “facility in the Las Vegas area” reduced putting green fertilizer cost by a staggering 82%.
Last year I wrote about a soil temperature turfhack. The soil temperature is almost always between the day’s high and low temperature.
The soil temperature at a 5 cm depth immediately after planting manilagrass stolons on 22 April.
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 temperature.
I’ve written about the attractions of metric units and how facility with those units can make turfgrass management easier. I want to explain this a bit more, especially as it is related to fertilizer and to water, first discussing 2 dimensional surfaces.