The Bertrand series consists of very deep, well drained soils, which are deep to stratifed sandy alluvium on stream terraces and lake terraces. These soils formed mostly in silty alluvium underlain by stratified sandy alluvium.
Permeability is moderate in the silty and loamy alluvium and rapid in the sandy alluvium.
Slopes range from 0 to 35 percent. Mean annual precipitation is about 30 inches. Bertrand silt loam - on a 3 percent slope in a cultivated field at an elevation of about 715 feet. 26, T. 9 N., R. 2 E., or 800 feet north and 50 feet east of driveway to farmhouse on west side of road. Thickness of the silty alluvium, depth to the base of the argillic horizon, and depth to sandy alluvium all range from 40 to 60 inches.