professor and head of the department at the University of Minnesota from 1989 to 2002. He is a licensed professional soil scientist and a fellow of the Soil Science Society of America, the American Society of Agronomy, and the American Association for the Advancement of Science. He served as president of the Soil Science Society of America (1995-1996) and president of the American Society of Agronomy in 1999. His research interests include the chemistry, biochemistry, and analytical chemistry of soils; carbon and nitrogen cycles; transformation and transport of nitrogen, pesticides, and organic matter in the soil environment; crop residue management, nitrogen availability and use efficiency, and groundwater quality; residue and waste management; impact of climatic changes on carbon and nitrogen transformation dynamics; and precision agriculture and agricultural sustainability. He currently is a member of the National Research Council (NRC) Board on Agriculture and Natural Resources. Dr. Cheng received his Ph.D. from the University of Illinois in 1961, and the University of Minnesota conferred upon him a LL.D. (Hon.) degree in 2004.

ROBIN K. CRAIG is the Attorney’s Title Insurance Fund Professor of Law at the Florida State University College of Law, Tallahassee. Prior to joining the law school in the fall of 2006, Dr. Craig was an associate professor of law and professor of law at the Indiana University School of Law, Indianapolis. She was a judicial clerk to Judge Robert E. Jones, U.S. District Court for the District of Oregon from 1996 to 1998, and also was a law clerk at the Oregon Department of Justice in the Natural Resources Section. Dr. Craig is active in the American Bar Association’s Section on Environment, Energy, and Resources, Administrative Law Section, and Ocean Policy Working Group. She has authored two books, The Clean Water Act and the Constitution (Environmental Law Institute, 2004) and an environmental law textbook, Environmental Law in Context (West, 2005). Professor Craig also has written numerous law articles on the Clean Water Act, ocean and coastal law, and law and science, as well as the “Oceans and Estuaries” chapter of Stumbling Toward Sustainability (Environmental Law Institute, 2002), a review of the U.S. progress toward sustainable use of natural resources. Dr. Craig received her B.A. from Pomona College, her M.A. from Johns Hopkins University, her Ph.D. from the University of California, and her J.D. degree from Lewis & Clark School of Law.

OTTO C. DOERING III is a professor of agricultural economics at Purdue University. He is a public policy specialist and has served the U.S. Department of Agriculture (USDA) working on the 1977 and 1990 Farm Bills. In 1997 he was the principal advisor to USDA’s Natural Resources Conservation Service for implementing the 1996 Farm Bill and served again in 2005 assisting in conservation program design and implementation. From 1985

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