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There’s more in soil than NPK

February 22, 2010

Go to the garden center and pick up a bag of fertilizer. The biggest description on the label is likely to include the percentages of NPK, three vital nutrients that plants need to sustain life. Nitrogen, phosphorus and potassium were first described as the building blocks of every plant's life in 1840 by chemist Baron Justus Von Liebig in his publication, ''Chemistry in Its Application to Agriculture.''



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