Winnebago soils have loess mantles less than l5 inches thick. Arbor soils lack argillic horizons. Argyle and Myrtle soils lack mollic epipedons. In addition, Myrtle soils are fine-silty. Ogle soils are fine-silty.
Durand soils are on undulating to hilly till plains and moraines.
Slope gradients range from l to 20 percent. The upper part of the solum formed in l5 to about 30 inches of loess or silty material and the lower part in reddish paleosols in loamy glacial drift. Durand soils have a mid-continental climate with hot summers and cold winters. These are the competing Argyle , Griswold , and Ogle soils and the Pecatonica and Tama soils. The Argyle and Pecatonica soils are on similar landforms as Durand soils near drainageways.