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秦娟, 上官周平
Seasonal soil and plant nutrients under Ulmus pumila and Robinia pseudocacia mixed plantation
QIN Juan, SHANGGUANG Zhouping
生态环境学报 . 2011, (3): 429 -434 .  DOI: 10.16258/j.cnki.1674-5906(2011)03-0429-06