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Impact of Long-Term Fertilization on Phosphorus Status in Black Soil[J]. HAN Xiao-Zeng1, SONG Chun-Yu1, WANG Shou-Yu1 and C. TANG2 1Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Harbin, 150040 (China). 2Department of Agricultural Sciences, La Trobe University, Bundoora, Vic 3086 (Australia).Pedosphere. 2005(03)