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- W1992509916 abstract "Abstract Yield, N uptake and residual NO 3 − -N data for wheat and maize, raised in a long-term experiment, have been discussed to determine optimum rates of fertilizer N application at which yields are least affected, while unused nitrogen, which is a potential pollutant, is reduced to a permissible level. Computation of fertilizer N rates corresponding to the points of greatest economic return and permissible N loss has been described. Optimum fertilizer N rate is the smaller of the two fertilizer N rates. By assuming a loss of 60 kg N/ha or less, as environmentally permissible, it was observed that a small yield increment of maize would have to be sacrificed for the protection of the environment; whereas, for wheat, nitrogen can be applied safely upto the point of greatest economic return. Coincidence of the rainy season with the growth period of maize in the study area seems to have reduced the fertilizer N rate, corresponding to the point of permissible N loss, lower than that for greatest economic return." @default.
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- W1992509916 date "1978-04-01" @default.
- W1992509916 modified "2023-09-30" @default.
- W1992509916 title "A rational approach for optimizing application rates of fertilizer nitrogen to reduce potential nitrate pollution of natural waters" @default.
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- W1992509916 doi "https://doi.org/10.1016/0304-1131(78)90006-1" @default.
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