A study found that the concentration of total N loss in rainfall runoff would increase with the increase in rainfall, and compared with dry years, the nitrate N leaching amount increased in years with abundance of water, while the Yangtze River Basin has abundant precipitation resources, and the total precipitation of rapeseed during the whole growth period was 680 mm on average, showing an increasing trend year by year [ 18 ].
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Research Progress in High-Efficiency Utilization of Nitrogen in Rapeseed.
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