By Arvin Mosier, J. Keith Syers, John R. Freney
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Extra info for Agriculture and the Nitrogen Cycle: Assessing the Impacts of Fertilizer Use on Food Production and the Environment (Scientific Committee on Problems of the Environment (SCOPE) Series, Volume 65)
1984. Crop rotations for efficient nitrogen use. Pp. 295–306 in Nitrogen in crop production, edited by R. D. Hauck. Madison, Wisconsin: ASA/CSSA/SSSA. Loomis, R. , and D. J. Connor. 1992. Crop ecology in productivity and management in agricultural systems. Cambridge: Cambridge University Press. Melaj, M. , H. E. Echeverria, S C. Lopez, G. Studdert, F. Andrade, and N. O. Barbaro. 2003. Timing of N fertilization in wheat under conventional and no-tillage system. Agronomy Journal 95:1525–1531. Neeteson, J.
Wheat (Triticum aestivum) Varietal differences in N use, the level of soil fertility, balanced use of nutrients, timing and rate of N application, tillage and early crop establishment, and weed/pest control influence crop growth, yield, and REN in irrigated wheat. During the grain filling period, wheat plants can lose N because of leaf senescence or leaching and volatilization of N from leaves. In addition, high temperature and low humidity during grain filling can reduce the remobilization efficiency of N to grain and post-anthesis N uptake from soil (Melaj et al.
In the context of N fertilizer, agricultural and environmental policies have major effects in determining use in a given country and the effect that N fertilizer is likely to have on the production of food and on the environment. qxd 8/6/04 1:09 PM Page 11 1. , Chapter 8, this volume) or whether environmental and perceived health issues dictate the agenda and lead to a reduction in N fertilizer use. In both cases, more efficient use of fertilizer N is desirable (Dobermann and Cassman, Chapter 19, this volume).