from the University of Iowa. He has been actively involved in research of agricultural and nonpoint source pollution, soil genesis, hydrogeology, and groundwater quality. He directs a variety of environmental programs related to agriculture including the Big Spring Basin Demonstration Project and the Model Farms Demonstration Project.

NEIL D. HAMILTON is the Ellis and Nelle Levitt Distinguished Professor of Law, and the director of the Agricultural Law Center at Drake University Law School. He earned his B.S. from Iowa State University and his J.D. from the University of Iowa College of Law. He has been involved in research covering the legal aspects of agricultural finance, land tenure and land use, property rights and conservation and environmental law. His area of primary interest is agricultural law and agricultural law as it applies to agricultural and environmental policy and land use.

WILLIAM E. LARSON received his Ph.D. in 1949 from Iowa State University. Now retired, he was the head of the Department of Soil Sciences at the University of Minnesota. During his career he was involved in research of soil structure and mechanics, water infiltration, nutrient interrelations in plants, crop response to soil moisture levels and soil temperature, tillage requirements of crops, utilization of sewage wastes on land, and effects of erosion on productivity and fertility.

LINDA K. LEE is a visiting associate professor teaching agricultural economics at the University of Connecticut. Her Ph.D. is in economics from Iowa State University. Research areas in which she has worked include natural resources and environmental economics, agricultural impacts on ground- and surface water, soil conservation, and land use.

PETER J. NOWAK is an associate professor at the University of Wisconsin-Madison. He received his Ph.D. in rural sociology from the University of Minnesota. His research work involves the application of sociological models to agricultural problems, transfer of technology to the rural community, and the organizational and informational obstacles to adoption of conservation practices.

KENNETH G. RENARD is a hydraulic engineer at the Southwestern Watershed Research Center, Agricultural Research Service, U.S. Department of Agriculture, Tucson, Arizona. His Ph.D. is in hydrology from the University of Arizona. Focal points of his research have been watershed hydrology relating land practices to water yields and peak

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