Nitrogen Management in Crop Production

"The book is both detailed and wide-reaching in its coverage of the role of nitrogen in crop-production systems and embraces issues such as crop rotation, tillage systems and the effect of soil erosion on nitrogen within the system. a very readable and comprehensive guide to nitrogen use in annual crops."N. Cannon, in European Journal of Soil Science

Auteur

Dr. N. K. Fageria, Doctor of Science in agronomy, is a senior research soil scientist at the National Rice and Bean Research Center, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), since 1975. Dr. Fageria is a nationally and internationally recognized expert in the area of mineral nutrition of crop plants and a research fellow and ad hoc consultant of the National Council for Scientific and Technological Development (CNPq) since 1989. Dr. Fageria is the author or co-author of 12 books and more than 320 scientific journal articles, book chapters, review articles, and technical bulletins. He is a member of editorial board of the Journal of Plant Nutrition and the Brazilian Journal of Plant Physiology.

Texte du rabat

The judicious use of nitrogen in crop production is highly desirable for both economic and environmental reasons, because much of the nitrogen applied to crop plants goes unused, resulting in environmental problems and waste. This book reviews the practical and theoretical aspects of nitrogen management in crop production. Chapters address the functions of nitrogen, nitrogen loss in the soil-plant system, diagnostic techniques for nitrogen requirements, management of soil organic matter, nitrogen interaction with other nutrients, biological nitrogen fixation by legumes, and management practices to improve nitrogen use efficiency.

Résumé

One of the main approaches for safeguarding food security, sustainable development has increased demand for knowledge on fertilizer management in crop production. Among essential plant nutrients, nitrogen is one of the most important yield-limiting nutrients, mainly responsible for determining yield and yield components in cereals and legumes. It is also responsible for the activation of many enzymes and, of course, plays an important role in photosynthesis. With a recovery efficiency of less than 50 percent in most cropping systems, a large portion of the nitrogen applied as fertilizer is not used by plants, creating environmental and economic issues.

Nitrogen Management in Crop Production covers the critical aspects for the judicious use of nitrogen in cropping systems. This includes appropriate methods of nitrogen application, effective source and timing of application during crop growth cycles, use of an adequate application rate to avoid loss and reduce cost, use of nitrogen-efficient crop genotypes, and use of legumes that fix sufficient amounts of atmospheric nitrogen. There is also a chapter on organic matter and its role in sustainability.

This book presents recent information from the international literature, making it relevant for most agroecological regions. Chapters provide experimental results to aid in practical application of the information. The book contains color photos of nitrogen deficiency symptoms to serve as a guide for important crop species, such as rice, dry bean, wheat, soybean, and corn. It also includes numerous tables and figures, providing an easy-to-read reference.

Contenu

Functions of Nitrogen in Crop Plants. Nitrogen Losses in SoilPlant System. Diagnostic Techniques for Nitrogen Requirements in Crop Plants. Management of Soil Organic Matter. Nitrogen Use Efficiency in Crop Plants. Nitrogen Interaction with Other Nutrients. Biological Nitrogen Fixation by Legumes. Management Practices to Improve Nitrogen Use Efficiency in Crop Plants. Index.