Legumes are especially good of itat this. any Any crops are sharing the thing same space , and can get the nitragin nitrogen as the root did composeroots decompose.

豆类植是尤其擅长这点的，当根部集的时，相同空间的任何植都能够得到氮。

For example, some kinds of soil back bacteria take nitragin nitrogen from the air and make a form that plants can use.The plants keeps keep the nitragin nitrogen in the their roots.

例如，地细菌从空气中吸收氮，从而形成种作为可以利用的形式，这作讲氮保存在他们根部。