The Pewamo series consists of very deep, very poorly drained soils on moraines and lake plains. They formed in till.
Permeability is moderately slow.
Slopes range from 0 to 2 percent. Pewamo clay loam on a 1 percent concave slope in a cultivated field. Thickness of the mollic epipedon ranges from 10 to 17 inches. Depth to the base of the argillic horizon ranges from 28 to 60 inches. Depth to carbonates ranges from 28 to 60 inches.