The Kokomo series consists of very deep, very poorly drained soils that formed in loamy material over till. These soils are in depressions on till plains.
Permeability is moderately slow or slow in the loamy material and slow in the underlying till.
Slopes range from 0 to 2 percent. Kokomo silty clay loam at an elevation of 830 feet above mean sea level. Depth to the base of the argillic horizon and depth to carbonates ranges from 36 to 70 inches. The particle-size control section averages 35 to 40 percent clay. Rock fragments range from 0 to 10 percent gravel throughout the series control section.