Choose a fertilizer that contains nitrogen, phosphorus, and potassium.
2
作为肥料应用的硫酸铵浓度会更高，但其中只有氮的成分，没有磷或钾。
Ammonium sulfate is also used as a fertilizer (although in much higher concentrations), but it only contains nitrogen but neither phosphorus nor potassium.
3
肥料处理促进油菜对全氮、全磷、全钾的吸收。
Fertilizer handling accelerated the absorption of nitrogen, phosphorus and kalium in cole.
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