Description:This new edition of a highly successful text, published in its second edition in 1981, adheres to the framework laid down by the late Professor Underwood, but has been thoroughly revised by Dr. Neville Suttle. In addition to bringing the book up-to-date, adding new definitions and reports on new advances, Dr. Suttle has added new chapters on such topics as the unique need of the ruminant for elemental sulfur, newer trace elements, notably chromium, and improved conduct and interpretation of supplementation trials. Easy reference appendix tables summarize essential information on feed composition, dietary requirements, and criteria of mineral status in livestock. The book will continue to represent a concise text on this important topic for advanced students of animal science.