Based on comparative analysis on spatial temporal distribution characteristics of soil nutrients of typical dam land in Beigou small watershed of Yan 'an City.
通过对延安市北沟小流域典型坝地土壤养分的测定，分析比较了其土壤养分时空分布特征。
Based on comparative analysis on spatial temporal distribution characteristics of soil nutrients of typical dam land in Beigou small watershed of Yan 'an City.
通过对延安市北沟小流域典型坝地土壤养分的测定，分析比较了其土壤养分时空分布特征。
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