Average annual precipitation is 22 to 24 inches. These are the Archabal , Blackwell , and Melton soils. Archabal soils are well drained. Blackwell and Melton soils are poorly drained and do not have a Bw horizon. Used mainly for pasture, small grains, clover, and seed potatoes.
Native vegetation is mainly grass, forbs, and some shrubs.
The soil is inextensive. Valley Area, Idaho, 1977.