RELATIONSHIP OF PLANT DEVELOPMENT TO THE CAPACITY TO UTILIZE POTASSIUM IN ORTHOCLASE FELDSPAR

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Abstract
Seed plants of varying degrees of development were grown in K-defident soil in three series. To one series no K was added; to another, KCl; to the 3d, orthoclase feldspar in quantity equivalent in K content to the 2d series. At maturity the K content of the plants was detd. by chemical analyses and percentage gains in all series were computed. Statistically the percentage gain of potassium from both soluble and insoluble sources tended to decrease as the plants ascend from the lower to the higher order of development. In the control medium, plants of the lower orders showed deficiency symptoms earlier than those of the higher orders.

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