Darmstadt soils have a natric horizon. Grantfork soils have 10 to 15 percent exchangeable sodium in the subsoil. The well drained Hickory soils formed in till and are downslope from Passport soils. Somewhat poorly drained. The potential for surface runoff ranges from low to high.
Permeability is moderately slow in the loamy materials and slow in the till.
An intermittent apparent seasonal high water table is present at a depth of 1 to 2 feet below the surface at some time between November and May in most years. Most areas are cropped. Corn, soybeans, and small grain are the principal crops. More sloping areas are in forages for hay or pasture, or in woodland. Native vegetation is deciduous forest.