摘要
总结了我国九个省区主要经济自然区土壤污染元素背景值图编制中取得的一些主要经验与成果。
The determination of drafting unit, the diuision of grades of drawing in background maps and some other problems in the statistic map of the division of grades of background contents in nine natural areas of econmics of China have been discussed and saummed up in the paper. The determinative principle of drafting units is based on the main and comprehensive factors which affect regional distribution of elements contents in soils; significant test ia used to divide grades of background contents.
出处
《地理研究》
CSSCI
CSCD
北大核心
1991年第1期39-47,共9页
Geographical Research
关键词
农业经济
自然区
土壤
背景值图
Soil background content map, Statistic map of the division of grades, Drabting unit.
