The soils formed in loamy alluvium that is usually stratified with coarser textured material in the lower part. The mean annual temperature ranges from 57 to 64 degrees F, and the mean annual precipitation ranges from 22 to 32 inches. Thornthwaite Annual PE Index ranges from 36 to 54. These are the Canadian , Farnum , Shellabarger , Waldeck , and Zenda soils. Farnum and Shellabarger soils have an argillic horizon and are on adjacent uplands.
Canadian soils are on slightly higher positions.
Waldeck and Zenda soils are on slightly lower positions. Runoff is slow. Permeability is moderate. Soils are rarely or occasionally flooded. Water table is generally below 6 feet except during periods of high stream flow.