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Table 1. Summary of Vegetative Data <br /> 2006 2007 <br /> <br />Portal <br />Cover 20.2%* 30.2%* <br />Production 161.3 1bs/acre 867.5 lbs/acre <br /> <br />Loadout <br />Cover 20.6% 40.6%* <br />Production 171.4 lbs/acre 949.3 Ibs/ acre <br />*Sample adequacy achieved <br />2006 Data <br />Some recent evidence of cattle grazing was observed on the portal area and to a much greater <br />extent at the Loadout during the 2006 sampling effort. The grazing influence had a negative effect <br />on the vegetative cover and production values. Attached Tables 3 through 6 provide the 2006 <br />data for cover and production. <br />Total vegetative cover on the Twin Pines portal area was 20% in 2006. The predominant life <br />form was grasses with 51.6% relative cover followed by shrubs with 41.8% relative cover. The <br />predominant grasses were western wheatgrass and smooth brome. Rubber rabbitbrush was the <br />most dominant species on the site, with 41% relative cover. Snakeweed was the primary sub- <br />shrub that appeared in the cover and it represented on 5.5% of the relative cover. Few forbs were <br />observed on the portal azea with only 0.5% relative cover comprised of Curlycup gumweed and <br />vetch. Noxious weeds or annual weeds were not a problem. No erosion problems were noted. <br />Herbaceous production in 2006 was 161.3 pounds per acre. This is a very low number and is <br />attributed to the drought and to grazing. <br />Ai the Loadout, total vegetative cover was 20.6%. The predominant lifeform was grasses at <br />42.2% relative cover followed closely by shrubs with 39.1% relative cover. A combination of <br />cool season western wheatgrass and warm season blue grama grass dominated the grasses. <br />Rubber rabbitbrush was the dominant shrub and the overall dominant plant on the reclaimed <br />azea. A combination of the sub-shrubs Pasture sage and Broom snakeweed comprised 15.5% of <br />the relative cover. Forbs contributed only a very small percentage, 3.2% of the relative cover. <br />Weeds were not a problem or major contributor to the plant cover. Herbaceous production on <br />the Loadout area was 171.4 pounds per acre. This low value is attributed to the grazing and the <br />extreme drought conditions in 2006. <br />In 2006 the approved standard of 200 pounds of air dry herbage per year was not achieved. The <br />lack of success is attributed to the extreme climate conditions and the recent grazing that had <br />obviously occurred on site. Despite the low vegetative cover and low production, the site was <br />stable and erosion was not a concern. <br />3 <br />