Average January temperature is 26 degrees F. and average July temperature is 68 degrees F. Average annual precipitation is about 15 to 22 inches. These are the Caldwell , Palouse , Tilma , and Schumacher soils. Caldwell soils do not have an argillic horizon and have 18 to 35 percent clay in the control section. Palouse, Tilma, and Schumacher are well drained soils that formed in loess. Used for grazing and for production of small grains, clover, and grass.
Native vegetation is tufted hairgrass, sedge, willows, and hawthorne.
The series is of small extent. Whitman County, Washington, 1975. This draft reflects a change in classification from Typic Argiaquolls to Vertic Argiaquolls.