At present the content of organic matter in the cultivated soil is at 5.30 g/kg~24.21 g/kg, averaging 14.65 g/kg. Compared with that measured during the second national soil survey, the content of organic matter shows a rising trend. The content of humin C accounts for about 53%~70%, averaging 61%, and that of humic acid C for about 39% of organic matter C.
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姜益娟,郑德明,吕双庆,朱朝阳,伍维模.新疆农田土壤有机质含量及组成特征[J].土壤,2004,36(1):43-45,60. JIANG Yi-juan, ZHENG De-ming, LU Shuang-qing, ZHU Zhao-yang, WU Wei-mo. COMPOSITION FEATURES AND CONTENT OF ORGANIC MATTER IN CROPPED SOIL OF XINJIANG[J]. Soils,2004,36(1):43-45,60