Response of soil organic matter to comprehensive agricultural development in Ningxia province
YANG Xinguo, SONG Naiping, LIU Xiaoyong, HE Xiuzhen, FANG Kai
Ecology and Environmental Sciences . 2011, (2): 286 -291 .  DOI: 10.16258/j.cnki.1674-5906(2011)02-0286-06

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