Effects of straw-returning on annual overland runoff NPK loss in farmland
LIU Hongjiang, ZHENG Jianchu, CHEN Liugen, XUE Xinhong
Ecology and Environment . 2012, (6): 1031 -1036 .  DOI: 10.16258/j.cnki.1674-5906(2012)06-1031-06

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