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48a <br /> 1-GLOSSARY OF SOIL TERMS <br /> Available Water The capacity to store water available for use by <br /> Capacity (AWC) plants, usually expressed (inches of water toer <br /> inch of soil depth) in linear depths of water <br /> per unit depth of soil. <br /> Aridisols Mineral soils that have an aridic moisture <br /> regime, an ochric epipedon, and other pedogenic <br /> horizons. (An order in the USDA soil taxonomy) <br /> Borollic Descriptive intergradation sub group term used <br /> to delineate soils that posess darker colored <br /> A-horizons than the typical Great Group Semiarid <br /> soils. <br /> Boundary The distinctness of separation between natural <br /> soil horizons. <br /> Cambic Horizon An altered subsurface horizon in which the <br /> texture of the fine earth fraction is loamy <br /> very fine sand or finer. Alteration may <br /> be either chemical or physical. <br /> Camborthids A mineral soil belonging to the Aridisol order <br /> which contains an ochric epipedon and a cambic <br /> subsurface soil horizon. <br /> Clay A mineral soil separate consisting of particles <br /> less than 0.002 millimeters in diameter. As a <br /> soil textural class, soil material that is 40 <br /> percent or more clay, less than 45 percent sand, <br /> and less than 40 percent silt. <br /> Consistence The degree of cohesion or adhesion of the soil <br /> mass or the resistance of natural soil structure <br /> to deformation or rupture. <br /> Entisols Mineral soils that have no distinct pedogenic <br /> horizons within 1 meter (40 inches) of the soil <br /> surface. (An order in the USDA soil taxonomy.) <br /> Frigid A soil temperature regime that has mean annual <br /> soil temperatures of more than 0 0 C but less than <br /> 80C, more than 5 0 C difference between mean summer <br /> and mean winter soil temperatures at 50 cm, and <br /> warm summer temperatures. <br /> I (factor) Wind erodibility factor for use in the wind <br /> erosion equation. (See wind erosion equation) . <br /> K (factor) A comparative value of a soils erosion susceptibility <br /> by water' theoretical values range from 0.00 to <br /> 1.00 with an increase in suspectibility as the <br /> value increases. Values less than 0.15 indicate <br /> low suspectibility; values greater than 0.35 <br /> indicate high erodibility. (See soil loss equation) . <br />