Abstract
The crops respond to applied nitrogen fertilizers, but are unable to express their full genetic potential due to decline in the availability of nitrate during later stages of crop growth. When nitrate is maintained in the soil during reproductive phases of crop growth, higher activity of N assimilatory enzymes in the upper leaves leads to an increased grain N. There is therefore, need to synchronize the supply with the requirement of the plant. This was tried through modification in the management practices. Higher activity of the enzyme nitrate reductase was maintained when nitrogen was provided at later stages of crop growth, leading to increased grain N.
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