Three years ago I used the country field from the MLSN newsletter subscription list to do a rough geographical analysis of those using MLSN. I found it most understandable, given the information available, to express the reach of MLSN in terms of the number of golf facilities per subscriber in various countries.
Anything resembling thatch or mat is explicitly excluded from the soil organic matter measurement made on routine soil nutrient analyses.
That portion of soil organic matter is excluded because it is not measured.
There’s a ton of work done to modify the soil organic matter of turfgrass surfaces. Fertilizer, water, and increased light will allow the grass to grow and naturally increase the organic matter in the soil.
In my recent “How MLSN Works” seminar—slides here—I mentioned some other ways to learn more about MLSN. The four items I recommended are:
The Humbug movie which explains MLSN and includes discussions with turfgrass managers who have used it.
I was reading the “Cultural Aspects of Disease Management” chapter in Management of Turfgrass Diseases by Dr. Vargas and came across this gem about soil pH:
“Most of the literature tells you that the soil pH should be maintained at the optimum level for turfgrass growth (between 6 and 7).
I almost always recommend keeping the soil pH above 5.5. This minimizes soluble aluminum in the soil, which can be toxic to roots. Get the soil pH above 5.5, and the soluble aluminum won’t be very soluble anymore—it drops almost to 0.