Fertilizer Nonsense #4: Soil Tests

Lots of information in books and on websites recommend a soil test to help you select the right fertilizer numbers. This is very good advice but it has limitations.

Fertilizer Nonsense #4 Soil Tests
Fertilizer Nonsense #4 : Soil Tests, source Noble Foundation

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Soil Testing for NPK

Which fertilizer should you be adding to soil? How much fertilizer should you add? Why is my plant not growing well? These are all very common questions and a very common answer to them is; do some soil testing!

That may be the right answer, but there is much more to the story. Let’s have a look.

Soil testing for NPK
Soil testing for NPK, source: r. nial bradshaw

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