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• <br />percent of the herbaceous production standazd with 90 percent statistical confidence. The Following <br />weighted formula will be used to evaluate revegetation success for herbaceous production: <br />(SBa) (xSB) + tea) (xMB) + (Aa) (xA) <br />xREV > .90 <br />Ta <br />with 90 percent statistical confidence <br />where: <br />x~V =Average herbaceous production fox revegetated area <br />SBa = Sagebmsh type acreage, premisng surface azea <br />MBa =Mixed brush type acreage, premising surface area <br />Aa =Aspen type acreage, premising surface area <br />xSB =Average reference area herbaceous production -sagebrush type <br />x~ =Average reference azea herbaceous production -mixed brash type <br />xA =Average reference area herbaceous production -aspen type <br />Ta =Total of relative community type acreages, premising surface azea. <br />• <br />Revegetation success for production, in the reclaimed mesic drainage type, will be evaluated by <br />comparing a weighted mean herbaceous production value determined from undisturbed portions of <br />the mesic drainage and improved pasture-subirrigated pretnine types. The areas previously occupied <br />by this latter type will be reclaimed to a mesic drainage type. The method . of weighting and <br />comparison is similar to that described under cover for the mesic drainage type. Herbaceous <br />production kom the mesic drainage reclaimed azeas will be compazed to the weighted mean value. <br />Reclamation success For herbaceous production shall be met when the value of the reclaimed azea is at <br />least 90 percent of the comparison standard with 90 percent statistical confidence. The following <br />weighting formula will be used. <br />x~v > .90 (~a)(xMD) + (IPSa)(xIPS) <br />Ta <br />• with 90 percent statistical confidence <br />where: <br />PR-02 39 Revised 01/06 <br />