Average January temperature is 26 degrees F, average July temperature is 68 degrees F, mean annual temperature is 47 degrees F, average frost-free season is 90 to 120 days, and mean annual precipitation is 15 to 22 inches. These are the Clayton and Laketon soils. These soils lack an aquic moisture regime and a mollic epipedon. Grazing, small grain, alfalfa and grass. Native vegetation is tufted hairgrass, reed canarygrass, red top, sedges, reeds, rushes, willows, aspen and hawthorne.
Series is of small extent.
Spokane County, Washington, 1964. Diagnostic horizon and features recognized in this pedon are a mollic epipedon from the surface to 55 inches with an assumed irregular decrease in organic carbon with depth, an aquic moisture regime, and too little clay increase in the Btg horizon to qualify as an argillic horizon.