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Authors Steven T. Sonka (chair) holds the Soybean Industrial Chair for Agricultural Strategy and is Director of the National Soybean Research Laboratory at the Uni- versity of Illinois at Urbana-Champaign. His research interests focus on the evalu- ation of strategic change in the agricultural sector. He received the American Agricultural Economics Associationâs 1996 award as outstanding undergraduate instructor and has twice received outstanding research honors from that associa- tion. Dr. Sonka is a partner in Agricultural Education and Consulting, a business and financial management consulting firm. He received his Ph.D. in economics from Iowa State University. Marvin E. Bauer is a professor of remote sensing at the University of Minne- sota. He has extensive experience in research and development of satellite remote sensing to inventory and monitor crops and forests. In 1996 he was awarded NASAâs Distinguished Public Service Medal in recognition of outstanding scien- tific and managerial contributions over the past 25 years to NASAâs terrestrial remote sensing programs. He received his Ph.D. in agronomy from the Univer- sity of Illinois. Edward T. Cherry is the director of government relations and agribusiness af- fairs for FMC Corporation. His responsibilities include working with legislators and government agencies on regulations affecting development, research, mar- keting, and sales of FMC products. He also worked for Ciba-Geigy managing product development for insecticides. Dr. Cherry received his Ph.D. in entomol- ogy from the University of Tennessee. 138
AUTHORS 139 John W. Colburn, Jr., is co-founder, president, and chief executive officer of Crop Technology, Inc., an agricultural electronics company that develops and markets Prescription Farmingâ¢ technologies including the Soil DoctorÂ® System. Mr. Colburn is a Texas Registered Professional Engineer who earned his M.S. in mechanical and aerospace engineering and materials science from Rice Univer- sity. He holds a number of U.S. and foreign patents in the field of precision agriculture emphasizing on-the-go sensing and variable rate application. Ralph E. Heimlich is the geographic information systems team leader for the Natural Resources and Environment Division of the Economic Research Service at the United States Department of Agriculture, where he has worked since 1976. Mr. Heimlich is an accomplished economist with considerable expertise in the areas of land use and conservation. He received a Master of city planning and M.A. in regional science from the University of Pennsylvania. Deborah A. Joseph is an associate professor of computer science and mathemat- ics at the University of Wisconsin-Madison. Her research interests include com- putational problems in molecular biology, complexity theory, and mathematical logic-recursion theory. She received the Presidential Young Investigator Award from the National Science Foundation in 1985. Joseph earned a Ph.D. in com- puter science from Purdue University. John B. LeBoeuf is a certified professional agronomist who works as the senior safety officer and pest control adviser for Fordel, Inc. Mr. LeBoeuf initiated the remote sensing project at Fordel, Inc., the first company in California to have a significant portion of its acreage using National Aeronautics and Space Adminis- tration technology. He is an active member of the American Society of Agronomy, California Agricultural Production Consultants Association, and California Melon Research Board. Mr. LeBoeuf received a B.S. in plant science from Utah State University. Erik Lichtenberg is an associate professor with the Department of Agricultural and Resource Economics at the University of Maryland-College Park. His re- search includes study of the use of pesticides and other chemicals and their effect on agricultural economics. In 1993-1994, Dr. Lichtenberg served as the senior economist for agriculture, natural resources, and international trade for the Presidentâs Council of Economic Advisers. He received his Ph.D. in agricultural and resource economics from the University of California-Berkeley. David A. Mortensen is an associate professor of agronomy at the University of Nebraska-Lincoln. Dr. Mortensen is a well-known weed ecologist and dedicated teacher whose principal research interests include plant ecology and weed man- agement and the development of weed-crop modeling software. He received the
140 AUTHORS 1994 Distinguished Young Scientist Award by the North Central Weed Science Society and in 1996 served as chair of the weed science panel for the National Research Initiative. He received his Ph.D. from North Carolina State University. Stephen W. Searcy is a professor of agricultural engineering at Texas A&M University, where he has taught since 1980. His research interests include the study of management and control systems for spatially variable crop production techniques and the application of digital electronics for sensing and control of agricultural processes. In 1985 Dr. Searcy served the United Nationsâ Food and Agricultural Organization as a consultant to Ludianha Agricultural University. Dr. Searcy received his Ph.D. in agricultural engineering from Oklahoma State University. Susan L. Ustin is an associate professor of resource science at the University of California-Davis, where she has taught since receiving her Ph.D. in botany. Her research interests include remote sensing of the environment as well as the use of EOS imaging spectrometers and synthetic aperture radar in ecological models. Dr. Ustin is a member of several professional associations, including the Ameri- can Society of Photogrammetry and Remote Sensing, IEEE Geoscience and Re- mote Sensing, and the Ecological Society of America. Stephen J. Ventura is an associate professor at the University of Wisconsin- Madison at the Institute for Environmental Studies and the Department of Soil Sciences, where he received his Ph.D. His research interests include environmen- tal monitoring and modeling and land information systems. Dr. Ventura is also an active member of several professional organizations, including the Wisconsin Land Information Association, the Soil and Water Conservation Society, and the American Congress on Surveying and Mapping.