Cedar county is located in eastern Iowa in the second tier of counties west of the Mississippi river and nearly midway in the state north and south. It lies partly in the Mississippi loess and partly in the Iowan drift soil areas and hence the soils in the county are partly loessial and partly glacial. By far the larger portion of the county, however, is covered by the loess deposits.
Stevenson, W. H. and Brown, P. E., "Soil Survey of Iowa, Report No. 28—Cedar County" (1922). Soil Survey Reports. 24.