parameterized plot system 参数化绘图系统
two-plot system 二区制
one plot system 单区制
optical plot system 光绘图系统
two-tier plot ratio system 地积比率两级制
system phase plot 系统相图
system of standard plot 标准样地体系
setting system of standard plot 标准样地设置体系
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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