If you want your plants to grow big and healthy, soil quality matters. Even if you aren’t planning on growing a lush veggie garden, all plants need nutrients to grow, in addition to light and water.

One of the essential nutrients for vigorous crop production is nitrogen. Yet most routine tests done in commercial soil testing labs do not measure available nitrogen in the soil. Soil scientists ...

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A soil test for phosphorus represents an index of phosphorus availability to crops. A soil test needs to correlate to crop response in order to provide a useful index of crop response and any ...