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- [5] Effect of Nitrogen Management on Yield and Water Use Efficiency of Rainfed Wheat and Maize in Northwest China[J]. DANG Ting-Hui, CAI Gui-Xin, GUO Sheng-Li, HAO Ming-De and L. K. HENG Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100 (China). Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China) FAO/IAEA Agriculture and Biotechnology Laboratory,