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Systematic Studies of Nitrogen Loss from Paddy Soils Through Leaching in the Dongting Lake Area of China[J]. JI Xiong-Hui1,2,2, ZHENG Sheng-Xian1, SHI Li-Hong1,2 and LIU Zhao-Bing1,2 1Soil and Fertilizer Institute of Hunan Province, Changsha 410125 (China) 2Hunan Agricultural Environment Research Center, Changsha 410125 (China).Pedosphere. 2011(06)