The average annual precipitation ranges from 13 to 18 inches. Mean annual temperature is about 49 degrees F. Frost-free season is 120 to 145 days and up to 190 days in Idaho. These are the Laufer , Matheny , Pataha , Stember and Thiessen soils. All of these soils are more than 20 inches deep to a lithic contact. Used for grazing and wildlife habitat.
Native vegetation is mostly bluebunch wheatgrass and western yarrow.
Southeastern Washington and northcentral Idaho. The series is of small extent. Asotin County, Washington, 1984. Diagnostic horizon and features recognized in this pedon are a mollic epipedon from the surface to 16 inches, a calcic horizon from 8 to 16 inches, and a lithic contact at 16 inches.