The thermal status and nature of the main types of soils in China were studied by differential thermal analysis (DTA) method. The results obtained showed that all the samples had lower exothermic peak at about 300℃; only black soil and yellow brown earth had both of lower and hi gher exothermic peaks.
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蔡祖聪,马毅杰.土壤有机质热性质初步研究[J].土壤学报,1988,25(2):139-145. Cai Zucong, Ma Yijie. THE PRELIMARY INVESTIGATION ON THERMAL NATURE OF SOIL ORGANIC MATTER[J]. Acta Pedologica Sinica,1988,25(2):139-145.