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Best Way to Test Soil for Fertilizer Needs?

6 years ago
last modified: 6 years ago

What is the best way to test soil on an ongoing basis, to understand if you have the right mix of nitrogen, phosphorous, and potash for a target plant type? I saw a product on Amazon that purports to test the nitrogen, phosphorous, and potash density in a non-numeric scale. Maybe it would be better to use a paper that is calibrated to a numeric result? What are others using?

I am also confused on the issue of micronutrients. Is there one all-purpose formulation that would provide sufficient nutrients for a plant, or is it really necessary to have a detailed soil analysis done and to then supply different preparations only for the specific nutrients that are deficient?

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