Phosphate Rock Available

Sep 10, 2018 was a stronger feeder on the phosphate rock than was wheat. The ratio of to Ca^5 (derived from the phosphate rock) was ^,5 in wheat, 1.2 in clover, and only 0,44 in the phosphate rock, from which they concluded that the plants took up phos phorus more readily than calcium from the phosphate rock.

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