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Fertility And Soils
1 years, 1 month ago
from Fertility And Soils
"With high crop yields in recent years, many producers wonder how much applied fertilizer is enough to hold soil tests at a desired value. Fertilizer ROI depends on the soil’s ability to supply a portion of a crop’s nutrient needs. Phosphorus (P) and potassium (K) follow a diminishing return for each additional pound of fertilizer applied, and since P and K are not mobile in the vast majority of soils, each nutrient can be found in relatively large quantities but only a small fraction of that total amount is available to plants. Here’s a look at some of the most common questions about soil tests and P and K management."
http://blog-crop-news.extension.umn.edu/2017/05/using-soil-tests-to-effectively-manage.html