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48d <br />• Torriothents A mineral soil belonging to the Entisol order which <br />contains an ochric epipedon and a torric moisture <br />regime. <br />Universal Soil An empirically developed formula historically used <br />Loss Equation to estimate soil loss on agricultural lands. The <br />erosion hazard, expressed in tons of soil lost per <br />acre per year, is based on land slope, rainstoL~n <br />characteristics, cover, management practices, and <br />the soil erodibility factor (K). <br />Ustic A soil rtuisture regime that is intermediate between <br />the aridic and odic regimes and comron in semi-arid <br />regions. A limited arrount of moisture is available <br />for plants but occurs at times when the soil temp- <br />erature is optinum for plant growth. <br />[find Erosion An equation used for the design of wind control <br />Equation systems is E = f(I,R,C,L,V) where E is the average <br />annual soil loss, expressed in tons per acre per <br />year, I is the soil erodibility R is the soil <br />ridge roughness, C is the climate factor; L is the <br />unsheltered distance across the field along the <br />wind erosion direction; and V is the vegetative <br />cover. <br />• <br />• <br />