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Effects of Long-term Chemical Fertilization on Soil Physical Properties of three soils in Shandong Province
Yang Guo, Zhang Yingpeng, Wei Jianlin, Gao Bimo, Li Yan, Dong Xiaoxia
Chinese Agricultural Science Bulletin . 2007, (12): 244 -244 .  DOI: 10.11924/j.issn.1000-6850.0712244