The difference of black soil humus content and structure in no-tillage and plowing tillage
ZHAO Hong, ZHENG Yintian, Lü Yizong, YUAN Liwei, ZENG Xiannan
Ecology and Environment . 2010, (5): 1238 -1241 .  DOI: 10.16258/j.cnki.1674-5906(2010)05-1238-04

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