Agriculture and the Nitrogen Cycle: Assessing the Impacts of by Arvin Mosier, J. Keith Syers, John R. Freney

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)

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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).

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