After twenty years as the bible of farm irrigation systems, this popular, comprehensive book has been extensively revised with new chapters on planning irrigation systems, environmental issues, irrigation efficiency and uniformity, chemigation, and the use of wastewater for irrigation, as well as major revisions reflecting changes in technology. This edition covers the design of surface, sprinkler, and microirrigation systems along with current information about basic soil water relationships, controlling salinity, and detailed, up-to-date methods of estimating crop and landscape water requirements. Editors Glenn J. Hoffman, Robert G. Evans, Marvin E. Jensen, Derrel L. Martin, and Ronald L. Elliott collaborated with over 44 of the world s leading experts to develop this essential reference book for those involved in engineering or management of farm irrigation systems.