EFFECTS OF A LIMITING ELEMENT ON THE ABSORPTION OF INDIVIDUAL ELEMENTS AND ON THE ANION: CATION BALANCE IN WHEAT

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Abstract
-Limiting a nutrient supplied to wheat plants grown in soil or in water cultures resulted in increased uptake of another nutrient absorbed as an ion of the same sign, or in decreased total uptake of nutrients absorbed as ions of the opposite sign. When N was limiting, P absorption was increased, as was S absorption in some series. Limiting K was accompanied by increased absorption of both Ca and Mg. Limiting Ca was accompanied by increased absorption of K and Mg, and by slightly decreased absorption of anions. Despite large differences in ratios of individual nutrients as a result of limiting one, there was a marked tendency toward a maintained balance between total anions and cations. This balance was always in favor of the anions.

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