The label "10-20-10" on a package of commercial fertilizer refers to the _______ the fertilizer.
A) percentages of nitrogen, phosphate, and potassium in
B) percentages of nitrogen, carbon, and oxygen in
C) percentages of phosphate, iron, and potassium in
D) rate at which nitrogen is released from
E) ratio of organic to inorganic matter in
Correct Answer:
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