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Posted by on Sunday, February 19, 2012 at 1:03pm.

Do NPK fertilizers contain all three elements (nitrogen, phosphorus and potassium) in them or just 1 of the three elements?

  • chemistry - , Sunday, February 19, 2012 at 2:19pm

    They contain these three in one form or another. Often they also contain other elements/compounds such as trace elements, weed killers, etc.

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