The American Society of Agronomy, the Crop Science Society of America, and the Soil Science Society of America are pleased to publish this highly relevant and comprehensive review of the principles and management of nitrogen in the earth's environment, Nitrogen in Agricultural Systems.
Nitrogen supply is of great importance to the food supply and to the health of the world's population, but mismanagement of the nitrogen supply can create environmental hazards. The nitrogen management principles described in this book promote judicious global management of our nitrogen resources. Co-editors, James Schepers and William Raun have done an excellent job of assembling this monograph.
The authors contributing to this book are highly regarded scientists who work at the forefront of research in nitrogen management, and their expertise brings great credibility to this book. Research scientists, land managers, and students from a broad range of disciplines will benefit greatly from this assemblage of in-depth knowledge of nitrogen management.
The Societies certainly appreciate the efforts of the editors, Drs. Schepers and Raun, who chose an outstanding group of authors, and who skillfully and carefully guided the development of the book. Thank you also to the members of the editorial committee, which included Drs. Ron Follett, Richard Fox, and Giles Randall.
The editors, along with the highly qualified authors, provide a truly excellent book, one of which all three Societies can be justly proud. We anticipate that the readers will find this book to be a highly valued resource.
Kenneth Moore, President of the American Society of Agronomy
William Wiebold, President of the Crop Science Society of America
Gary A. Peterson, President of the Soil Science Society of America
Nitrogen in Agricultural Systems provides an extensive review of the principles and management implications related to nitrogen in the soil–plant–water system. The volume supersedes Agronomy Monograph 22 Nitrogen in Agricultural Soils published in 1982 and Agronomy Monograph 10 Soil Nitrogen published in 1965. Advances in scientific techniques and instrumentation used to study the various interactions and relationships between nitrogen and the environment in the past several decades have prompted this analysis and compilation of current knowledge. Authors participating in this edition have introduced new concepts as well as updated and broadened understandings presented in earlier editions. New chapters have been added to address growing concerns over environmental protection and the efficient use of resources. Significant advances in analytical devices and computational tools have broadened the perspective from which authors present and discuss their specific views on each aspect of the nitrogen cycle.
This volume combines several chapters from previous editions dealing with the sources and forms of nitrogen in the environment and expands discussion of nitrogen loss mechanisms from soil and vegetation. Nitrogen transformations remain a common thread throughout in the discussion of biological, chemical, physical, and weather-related interactions. New research tools and advanced management concepts are presented and discussed from a holistic perspective that emphasizes the complexity of the nitrogen cycle. The subjects of accountability and nitrogen budgeting are emphasized because they have a strong bearing on management decisions and the environmental implications. The concept of soil–plant resiliency is introduced as a framework from which to better understand and appreciate how climate, soils, and plants interact to broadly delineate cropping eco-regions. The ensuing nitrogen management schemes reflect crop responses, as well as how producers assess and are able to respond to risks. Sections on economic considerations and the water quality implications of nitrogen management are included. The literature on nitrogen in agricultural systems is vast and continues to expand, which precludes including all references. The editors and authors apologize for the omission of any pertinent citations and contributing research.
The editorial committee is grateful to the authors for their dedication, cooperation, patience, and support in the completion of this revision. Thanks are extended to the many individuals who graciously reviewed the manuscripts and offered constructive comments. Special acknowledgement is given to the Headquarters staff for editing and assistance in preparation of this manuscript for publication.
The Editorial Committee
J. S. Schepers, Co-editor, USDA-ARS, Lincoln, Nebraska
W. R. Raun, Co-editor, Oklahoma State University, Stillwater, Oklahoma
R. F. Follett, USDA-ARS, Fort Collins, Colorado
R. H. Fox, Pennsylvania State University, University Park, Pennsylvania
G. W. Randall, University of Minnesota, Waseca, Minnesota