Des Moines County is located in southeastern Iowa along • the Mississippi River and in the second tier of counties north of the Missouri state line. It is entirely in the Mississippi loess soil area and hence practically all of the soils of the county are loessial in origin.
Stevenson, W. H. and Brown, P. E., "Soil Survey of Iowa, Report No. 45—Des Moines County Soils" (1927). Soil Survey Reports. 32.