6类土壤TOC含量大小顺序为：褐土黑垆土黄绵土湘黄土风沙土潮土，差异达极显著水平。
The size order of TOC was cinnamon soil dark loessial soil loessial soil xiang yellow soil aeolian sandy soil alluvial soil , and the difference between 6 types of soil was extremely significant level . 2 .
绵土