Phil Collinson asked an interesting question: when calculating N inputs, do greenkeepers account for N added outside of fertilizer?
Greenkeepers - when calculating N inputs for the year do you account for N outside of fert?
Hollow-tine aerification, coring, core aeration, whatever you call it, removes organic matter from the soil.
But if you measure the soil organic matter before pulling any cores, and then measure again after the cores are removed, the soil organic matter % will be exactly the same.
Perspective. It’s funny how that works.
When I first read this research report in 2011, I skimmed over some parts, and cherry-picked what I was looking for — that 15 to 20% surface area removal was required every year in order to keep soil organic matter under control.
This post takes a few minutes to read because it covers this topic in a bit of detail. The summary is, I make use of two types of soil organic matter tests for turfgrass, these tests measure two different things, both important, and I recommend turfgrass managers measure both of these, ideally once a year.
These are the predicted distributions and percentiles of total organic matter in the surface 2 cm (0.8 inches) of warm-season grass putting greens.
I include a plot for predicted organic matter of a random green of an unknown species.
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.