Soil nutrients and extra beer | Asian Turfgrass Center

In that beer example, I want to keep a certain amount of beer on hand, to ensure that I don’t run out of beer at a small party. I could describe the beer analogy as a way to figure out how much beer to buy if I’m inviting some friends over to watch a game and I want to make sure I have an extra six-pack or two in reserve. When I was preparing a presentation ^{about grass grass nutrition, I realized someone might argue against this by saying, “I’m not comfortable with a six-pack in reserve; I want 50 beers in reserve.”}

I wrote this note:

To illustrate how safe MLSN is in this regard, consider calculating the K, P, Ca, Mg, and S minimums and displaying them in terms of the expected time to use everything, rather than in ppm.

And these are the expected times. For this example:

With these simple calculations, for a root zone depth of 10 cm (4 in) with a bulk density of 1.5 g/cm³the MLSN values ​​for each element amount to a minimum of 2.7 years of plant use for sulfur and a maximum of 120.5 years of plant use for calcium.

Remember, the way MLSN works is that we apply nutrients to keep the soil from dropping below these values. These nutrients are not used by the grass. They are just there, in the ground, like an untouched reserve. And if the grass were to dive into this reserve, these values ​​represent year of plant use.