Peno soils formed in firm clay loam glacial till. Mean annual temperature ranges from 45 to 48 degrees F, and mean annual precipitation ranges from 17 to 21 inches. These are the Cavo , Demky , Gettys , Hoven , Jerauld , Oko , and Raber soils. Cavo, Demky, Hoven, and Jerauld soils have a natric horizon. Cavo, Demky, and Jerauld soils are on the smoother less sloping parts of the landscape.
Hoven soils are in depressions.
Gettys soils do not have a mollic epipedon and are on nearby steeper landscapes. Glenham soils are fine-loamy and the Oko soils contain more clay and have vertic characteristics. Gettys and Oko soils are on similar landscapes. Runoff is medium. Permeability is moderately slow or slow.