ARIZONA IDAHO

Typical Environments:  Arid or dry desert regions  Western United States  Australia  Argentina  Portions of Africa  Middle East  Regions with little precipitation!!  Used mainly for range, wildlife, and recreation

 Contain CaCO 3  Dry most of the year = limited leaching  Some subsurface horizon development (A, Bk, C is typical sequence)  Subsurface horizons with accumulation of clays, CaCO 3, silica, salts, and/or gypsum (these materials leached from soils of moister climates)  Silica-cemented hardpans (duripans)  Not enough precipitation for normal agriculture  Salt build-up (salinization) is dangerous when used for irrigated agriculture

 Ochric Epipedon  Argillic or Cambic subsurface (B) horizon

XERIC ARGIDURID-- SOUTHERN IDAHO TYPIC AQUISALID— CENTRAL NEVADA