nitrogen fertilizer rates

• 氮肥施用量

nitrogen fertilizer rates的用法和样例：

例句

1. Despite the reduced oil content with increasing nitrogen rates, the highest oil production per hectare came from the highest nitrogen treatment.
   尽管随着氮肥施用量的增加含油率下降，但每公顷最高油产量仍得自于最高的施氮肥处理。