setting system of standard plot 标准样地设置体系
Indicators for evaluating land quality of standard plot were proposed in order to construct national analogy system of standard plot.
提出标准样地土地质量评价指标体系，以构建全国标准样地类比体系。
The implication of agricultural land resources security and its causes were analyzed. The standard plot system of agricultural land classification and its function were discussed.
该文首先分析了农用地资源安全的含义及其产生原因，论述了农用地分等标准样地体系及其基本功能；
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