Mean annual temperature is about 51 degrees F, and mean annual precipitation is about 33 inches. Keomah silt loam with a slope of about 2 percent - cultivated. Solum thickness typically is about 48 inches and it ranges from 40 to 76 inches. Carbonates are not present in the upper 40 inches and commonly are are not present in the upper 60 inches. The series control section averages less than 7 percent sand and rock fragments are generally absent.
Reaction is moderately acid, strongly acid, or very strongly acid in the most acid part of the sola.
Redox concentrations consist of high chroma stains, masses, or soft accumulations of iron and manganese oxides. The hue typically grades from 10YR to 5Y and chroma of 2 becomes dominant with increasing depth. Between the base of the Ap horizon and a depth of 30 inches at least one horizon, and commonly more, has chroma of 3 or more in greater than 40 percent of the volume. The BC and C horizons have hue of 10YR to 5Y, value of 4 or 5, and chroma 2 to 4 and is silty clay loam or silt loam. They contain high chroma redox stains, masses, and concretions.