The Winneshiek series consists of well drained soils formed in about 2 feet of glacial drift and a thin layer of residuum over limestone on uplands.
Permeability is moderate in the drift and slow in the residuum.
Slope ranges from 0 to 18 percent. Mean annual temperature is about 46 degrees F, and mean annual precipitation is about 32 inches. Winneshiek loam with a slope of about 3 percent - cultivated. Solum thickness is typically about 24 inches and ranges from 20 to 40 inches. Carbonates are lacking above the limestone bedrock.