INTERNAL PRECIPITATION OF PHOSPHORUS IN RELATION TO ALUMINUM TOXICITY

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Abstract
Barley was grown in solns. with and without Al. High total P, and low water-soluble P in the Al-toxic plants indicate the internal inactivation of P. Total P, and pH 3 H2SO4-soluble P were of the same magnitude in the normal plants. Since the acid did not extract Al phosphate salts which were added to the normal plant material, and extracted much smaller amts. of P from the toxic plants, it was assumed that P was bound with Al in the latter, and thus became unavailable for plant metabolism.
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