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- Published online December 13, 2021.
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© 2021 by the Soil and Water Conservation Society
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- Keith E. Schilling is state geologist and director of the Iowa Geological Survey at the University of Iowa, Iowa City, Iowa.
- Thomas M. Isenhart is professor in the Department of Natural Resource Ecology and Management at Iowa State University, Ames, Iowa
- Calvin F. Wolter is a GIS specialist at the Iowa Department of Natural Resources, Des Moines, Iowa.
- Matthew T. Streeter is a soil scientist at the Iowa Geological Survey at the University of Iowa, Iowa City, Iowa.
- John L. Kovar is a research scientist at USDA National Laboratory for Agriculture and Environment, Ames, Iowa.