Kalamazoo and Kidder soils have more than 40 percent sand in the lower part of the series control section. LeRoy and Strawn soils are less than 24 inches deep to the base of the argillic horizon and to carbonates. Owosso, Princeton, and Wawasee soils have less than 27 percent clay and more than 40 percent sand in the middle part of the series control section. Relay soils have hue of 5Y and rock fragments of gabbro, metagabbro, and granodiorite throughout the series control section. Theresa soils have a calcium carbonate equivalent of more than 40 percent in the lower part of the series control section.
Senachwine soils are on till plains.
Slope ranges from 2 to 60 percent. Senachwine soils formed in as much as 18 inches of loess or other silty material and in the underlying calcareous loamy till of Wisconsinan Age. Illite is the dominant clay mineral in the till. Mean annual precipitation ranges from 29 to 35 inches, mean annual temperature ranges from 46 to 54 degrees F, frost free period ranges from 150 to 180 days, and elevation ranges from 600 to 1,200 feet above sea level. These are the Birkbeck , Catlin , Hennepin and La Rose soils.