Abstract

Wheat (Triticum aestrivum L.) plants were grown in the greenhouse using a 2n deficient soil (Typic Torripsamment) treated with nine levels of Zn ranging from 0 to 100 ppm. The magnitude of Zn response was 'dependent on growth stage and Zn level. A dose upto 20 ppm Zn had no deterimental effect on yield. In early stage of growth, 2.5 ppm Zn was found better than the other levels tried. But, at later stages a higher rate of Zn (10 ppm) could meet the requirement of the crop. Concentri tion of Zn in different plant parts increased with the rate of its application and it was invaulable higher in lower leaves than in t middle and upper ones. There was considerable build up in tissue Zn concentration at higher. Zn levels without substantial difference in yield. The amount of DTPA extractable Zn decreased. With time primarily due to fixation in soil during crop growth as the total amount of Zn removed through shoot growth was only a small proportion.

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