F. Mean annual precipitation is 12 to 16 inches. Frost-free season is 110 to 175 days. These are the Bakeoven , Lickskillet and Wrentham soils. Bakeoven, Lickskillet and Wrentham soils contain more than 50 percent fragments coarser than 2mm. Bakeoven and Lickskillet soils are less than 20 inches deep to bedrock.
Principal use is for production of dryland grain crops.
Other uses are hay and pasture and native rangeland. Vegetation is mainly bluebunch wheatgrass, Idaho fescue, Sandberg bluegrass and forbs such as yarrow, phlox and buckwheat. The series is moderately extensive. Gilliam County, Oregon, 1939. The amount of calcium carbonate equivalent needs to be determined to verify if this series has over 15 percent calcium carbonate, or if it only has identifiable secondary carbonates.