Using traditional techniques such as crop rotation, compost and manure to supply the soil with nitrogen and other minerals would have required a tripling of the area under cultivation.

如果采用传统技术如轮作和堆肥为土壤补充氮和其他物质，就需要耕地也增长三倍了。

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Soil microbial biomass N also involved in nitrogen supply to crop.

土壤中微生物氮也参与了对作物的供氮过程。

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The nitrogen mineralization - immobilization turnover(MIT) process in soil is closely connected with the capacity of nitrogen supply to plant and the loss of nitrogen to environment .

土壤氮矿化-固持周转（MIT）过程与土壤供氮力及氮素损失间存在密切关系。

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