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In the late summer of 1934 the Soil Conservation Service began a reconnaissance erosion survey of the United States. The Soils Subsection of the Iowa Agricultural Experiment Station cooperated in Iowa, and the findings are reported in this bulletin.
Iowa State College. Agricultural Experiment Station
Agriculture | Soil Science
Walker, R. H. and Brown, P. E., "Soil erosion in Iowa" (1936). Special Report. 2.