Nitrogen Pollution Load in Farmlands Under Two Typical Farming Systems in the North of the Lake Erhai Region
WANG Zhe, XIE Jie, FANG Da, WU De-Yi, KONG Hai-Nan, LIU Ai-Wu, LI Mei-Xin, LIU Wen-Xiang
Journal of Ecology and Rural Environment . 2013, (5): 625 -629 .