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Studies on nitrogen efficiency improvement under flooded conditions part 1 effect of different methods of nitrogen application on the grain yield of rice



Studies on nitrogen efficiency improvement under flooded conditions part 1 effect of different methods of nitrogen application on the grain yield of rice



Bulletin of the Faculty of Agriculture Yamaguchi University (27): 67-78



The broadcast application of fertilizer N failed to increase the productivity of rice because of the loss of N under flooded conditions. The application point placement of N fertilizer, especially mudballs, and the use of slow-release N fertilizers such as SCU [S-coated urea] or IBDU [isobutylidenediurea] reduced N loss. However, the grain yield in these treatments were not always higher due to low N absorption during the reproductive stage of rice. The application of N fertilizer at a rate corresponding to the mineralization of decomposable soil organic N ensures the efficient use of N fertilizer.

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