soil background content map 土壤背景值图
Basic data in mapping soil background content has 302 analytical data of soil elements and regional distribution which are mapped with computer plotting and factor analysis.
编制土壤背景值图的基础资料有302个样点的无素测定值和运用计算机制图和因素分析法揭露的元素区域分布规律。
The background value of cobalt in soil of Yunnan province was sampled and analyzed, the results show that the cobalt content in soil is log-normal distribution, the median is 16.
对云南省土壤钴元素背景值进行了采样分析，结果显示：云南土壤钴元素含量呈对数正态分布，中位值16。
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