氮肥

• As was just discussed , nitrogen also has an important effect on the effectiveness of potash
  如前所述，氮肥对钾肥的有效性同样具有重要作用。
• Study on application technique of nitrogen fertilizer under condition of rice residues in soil in frigid region
  寒地稻秸还田氮肥施用技术研究
• The effects of uniconazole on the wheat seed nitrogen metabolize under different nitrogen levels
  不同氮肥水平下烯效唑对小麦籽粒氮素含量的影响
• Where they do use chemical fertilizer , they tend to use nitrogen only , thereby mining the soils
  使用化肥时，只施用氮肥，从而其它养分逐渐耗竭。
• Products used in agriculture . fertilizers . determination of nitrogen content in class a nitrogenous fertilizers
  家用产品.甲类氮肥.氮含量的测定
• Study of the leaf photosynthesis characteristics and nitrogenous fertilizer adjustment effect of brown cotton
  棕色彩棉叶片光合特性与氮肥调节效应
• Optimum distribution of nitrogen fertilizer in semi - dwarf japonica rice for late - planted mono cropping
  半矮生型单季晚粳稻氮肥运筹分配效应试验研究
• Effect of nitrogen application on the senescence of flag leaf and yield of rice cultivated in aerobic soil
  氮肥运筹方式对旱作水稻衰老及产量的影响
• Effect of planting date , plant density and nitrogen application rate on yield and quality of vegetable soybean
  氮肥用量对菜用大豆产量和品质的效应
• However , regression analysis shows that the most profitable nitrogen treatment is 50 kg / ha of n
  然而回归分析表明最佳收益的氮肥处理是50公斤n /公顷。