He studied how to improve soil condition.

他研究过如何改良土壤.

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Data on the influence of improved soil condition on plant diversity is also presented.

本文还进一步研究了土壤基质条件等变化对植物多样性的影响.

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In addition, two more important natural factors in site selection are drainage and soil condition.

另外, 排水和土壤状况是在选择场地时必须要考虑的自然因素.

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It was also effective to improve the soil condition and increase its usable phosphor content.

能改善土壤性状,增加土壤有效磷的含量.

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Effect of soil conservation forest depends on land surface cover of dead leave and soil condition.

水土保持林的效益主要取决于林地枯落物和林地土壤状况.

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