Mean annual temperature ranges from 49 to 52 degrees F., and mean annual precipitation ranges from 35 to 38 inches. The well drained Lauramie and Mellott soils have dark colored surface layers less than 10 inches thick. Lauramie soils have more sand in the upper part of the sola and are on more sloping areas in the landscape. Mellott soils are on similar landscape positions. Runoff is slow.
Permeability is moderate.
Most areas are cropped to corn, soybeans, or small grain. A few areas are used for legume hay or pasture. Native vegetation was tall prairie grasses, chiefly big bluestem. West-central Indiana and Illinois. Vermillion County, Illinois, 1930.