1. Dana L D, Douglas L K, Dan B J, Thomas C K, Jerry L H, Thomas S C, Cynthia A C (2002). Nitrogen management strategies to nitrate leaching in tile-drained Midwestern soils. Agronomy Journal, 94: 153–171
2. Guillard K, Griffin G F, Allinson D W, Yamartino W R, Rafey M M, Pietrzyk SW (1995). Nitrogen utilization of selected cropping system in the U.S. northeast: soil profile nitrate distribution and accumulation. Agronomy Journal, 87: 199–207
3. Han Y L, Jie X L, Tan J F, Guo T C, Zhu Y J, Wang C Y, Xia G J, Liu Z (1998). Studies on absorption distribution and translocation of N, P and K of super-high-yielding winter wheat. Acta Agronomica Sinica, 24(6): 908–915 (in Chinese)
4. Huo Z Y, Ge X, Zhang H C, Dai Q G, Xu K, Gong Z K (2004). Effect of different nitrogen application types on N-absorption and N-utilization rate of specific use cultivars of wheat. Acta Agronomica Sinica, 30(5): 449–454 (in Chinese)
5. Jaime L, Antonio L, Javier F, Sergi E, Joan S (2001). Bread-making wheat and soil nitrate are effected by nitrogen fertilization in irrigated Mediterranean condition. Agronomy Journal, 93: 1183–1190