Dr. Lee R. McDowell is a distinguished scientist in animal nutrition. He is also editor on Nutrition of Grazing Ruminants in Warm Climates (Academic Press, 1985). For the past 23 years, he has been working on animal nutrition studies at the University of Florida and with numerous collaborating animal scientists in Latin America, Africa, Asia, and other areas. He has lectured throughout the world and has collected research data, photographs, and other materials of value for this book. Contact with many of the world's leading nutrition scientists has greatly enriched his expertise.