Gibbon soils are fine silty, and slightly lower on the landscape. Luton soils are poorly drained, lower on the landscape and are in the fine family. Gibbon and Luton soils are saturated higher in the series control section for longer periods during the growing season. Well drained or moderately well drained. Runoff is low.
Permeability is moderate.
Most areas are cropped to corn, soybeans, or alfalfa. Some areas are irrigated. The principal irrigated crop is corn. The Janude series is of moderate extent. These soils were formerly mapped in the Cass series.