tailieunhanh - Soil and Water Quality

You may browse and search the full, authoritative version for free; you may also purchase a print or electronic version of the book. If you have questions or just want more information about the books published by the National Academies Press, please contact our customer service department toll-free at 888-624-8373. "An extremely informative book. | Soil and Water Quality An Agenda for Agriculture Free Executive Summary http catalog Free Executive Summary Soil and Water Quality An Agenda for Agriculture Committee on Long-Range Soil and Water Conservation Policy National Research Council ISBN 978-0-309-04933-7 542 pages 6 x 9 hardback 1993 This free executive summary is provided by the National Academies as part of our mission to educate the world on issues of science engineering and health. If you are interested in reading the full book please visit us online at http catalog . You may browse and search the full authoritative version for free you may also purchase a print or electronic version of the book. If you have questions or just want more information about the books published by the National Academies Press please contact our customer service department toll-free at 888-624-8373. An extremely informative book. --CHOICE This executive summary plus thousands more available at . Copyright 2007 National Academy of Sciences. All rights reserved. Unless otherwise indicated all materials in this PDF file are copyrighted by the National Academy of Sciences. Distribution or copying is strictly prohibited without permission of the National Academies Press http permissions Permission is granted for this material to be posted on a secure password-protected Web site. The content may not be posted on a public Web site. Executive Summary The . economy and the livelihood of citizens depend on soil water air plants and animals and natural and managed ecosystems as fundamental resources. Agricultural production by its very nature has pervasive effects on all these resources. Agricultural production takes place within farming systems. Those systems are defined by the pattern and sequence of crops the management decisions regarding the inputs and production practices used the management skills education and objectives of the producer the quality of the .