Principles of Sustainable Soil Management in Agroecosystems

Rattan Lal is a distinguished university professor of soil physics in the School of Environment and Natural Resources and the director of the Carbon Management and Sequestration Center, Food, Agricultural, and Environmental Sciences/Ohio Agriculture Research and Development Center, at the Ohio State University. Previously, he was a soil physicist for 18 years at the International Institute of Tropical Agriculture, Ibadan, Nigeria. Professor Lal conducted long-term experiments on topics including land use, watershed management, soil properties, soil tillage and crop-residue management, and cropping systems. He has continued research on erosion-induced changes in soil quality and developed a new project on soils and climate change. He has demonstrated that accelerated soil erosion is a major factor affecting emission of carbon from the soil to the atmosphere.

B.A. Stewart is a distinguished professor of soil science at the West Texas A&M University, Canyon, Texas. He is also the director of the Dryland Agriculture Institute and a former director of the US Department of Agriculture (USDA) Conservation and Production Laboratory at Bushland, Texas; a past president of the Soil Science Society of America; and a member of the 1990-1993 Committee on Long- Range Soil and Water Policy, National Research Council, National Academy of Sciences. He is a fellow of the Soil Science Society of America, American Society of Agronomy, and Soil and Water Conservation Society and a recipient of the USDA Superior Service Award and the Hugh Hammond Bennett Award of the Soil and Water Conservation Society.