The Brenton series consists of very deep, somewhat poorly drained soils formed in loess or other silty material and in the underlying loamy stratified outwash. These soils are on outwash plains and stream terraces.
Permeability is moderate.
Slope gradients range from 0 to 5 percent. The depth to the base of argillic horizon ranges from 38 to 60 inches. Carbonates are below a depth of 40 inches. The depth to the horizons with greater than 15 percent sand ranges from 24 to 40 inches. The particle-size control section averages between 25 and 35 percent clay.