Tustin soils formed in sandy deposits 20 to 36 inches thick and in the underlying loamy and clayey water-laid deposits or clayey glacial till. The moderately well drained Seward and the somewhat poorly drained Rimer soils are on slightly lower positions in the landscape and form a drainage sequence with the Tustin soils. Briggsville, Kewaunee, and Oshkosh soils are geographically associated where the sandy deposit thins to less than 20 inches. Nebago soils are nearby in some places but they do not have an argillic horizon. In some places where the sandy deposits thicken to more than 60 inches, Shawano soils are a nearby associate and are sandy throughout.
Surface runoff is slow to very rapid.
Permeability is rapid in the sandy mantle, moderate in the loamy subsoil, and slow in the clayey subsoil and substratum. Most areas of this soil are cropped. The principal crops are alfalfa, corn, and oats. Some areas are in woodlots or in pasture. Native vegetation was mixed forest cover of pine and deciduous trees.