Mystic soils formed in late Sangamon paleosols which formed in alluvium. Mean annual temperature ranges from about 50 to 54 degrees F, and mean annual precipitation ranges from about 32 to 36 inches. These are the competing Caleb , Gara , Lindley , and Shelby series. Gara, Lindley, or Shelby soils commonly are upslope on that portion of the glacial till slope dissected in late Wisconsinan time. Moderately well drained and somewhat poorly drained.
Permeability is slow.
Many areas are used for hay and pasture but some areas are used for cultivated crops. Native vegetation was mixed prairie grasses and deciduous trees. They are of moderate extent. Appanoose County, Iowa, 1970. Changes include proposals made in Amendment 17 of Soil Taxonomy.