8Doran J W, Parkin T B. Defining and assessing soil quality[M] // Soil Society of America Spatial Publication (SSSA Spec. Publ). 35. SSSA and ASA, Madison, Wisconsin, 1994 : 3-211.
9崔玉亭.化肥与农业生态环境保护[M].北京:化学工业出版社,2001.
10Chen X.Optimization of the N fertilizer management of a winterwheat/summer maize rotation system in the Northern China Plain. . 2003