The Flanagan series consists of very deep, somewhat poorly drained soils that formed in loess or other silty material and the underlying loamy calcareous till on till plains.
Permeability is moderately slow.
Slope ranges from 0 to 7 percent. Mean annual air temperature is 51 degrees F, and mean annual precipitation is 35 inches. The depth to the base of the argillic horizon ranges from 45 to 65 inches. The depth to horizons with more than 10 percent sand ranges from 40 to 60 inches. Soil development extends into the glacial till.