Four typical black soils, black soil medium-thick in soil layer, black soil medium in layer, eroded black soil and black soil thin in layer were selected for stationary study. Based on the results, horizontal and vertical comparisons and analysis of formation of the impedient factors in the black soils and their effect on soil productivity were carried out.
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孟凯,张兴义,隋跃宇.东北北部农田黑土障碍因子分析[J].土壤,2003,35(2):145-147,151. Meng Kai, Zhang Xingyi, Sui Yueyu. IMPEDIENT FACTORS IN BLACK SOIL IN THE NORTHERN-NORTHEAST CHINA[J]. Soils,2003,35(2):145-147,151