A way to encourage larger yields and fertilize the soil is to help the production of nitrogen.

一种增加产量肥沃土壤的方法，就是帮助氮肥的产生。

youdao

The question of food-production resolves itself, then, into the question how best to fertilize the soil.

然后，解决粮食生产的问题本身也变成了如何更好地改善土壤的问题。

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Different use level could make completely different effect. Incorrectly using organic fertilizer couldn't fertilize the soil.

不同用量也会产生截然不同的作用，不当施用有机肥不能培肥土壤。

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The students use the mixture to fertilize the soil instead of buying chemical fertilizers that could harm the environment.

VOA: special.2009.04.14

Cyclical tools are like trees, whose falling leaves fertilize the soil in which they grow.

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