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Table 6.4 - l iomass Production from Native Rangeland <br />July 2007 <br /> 2004 <br />Production <br />bs/ac 2005 <br />Production <br />Ibs/ac 2006 <br />Production <br />Ibs/ac 2007 <br />Production <br />Ibs/ac % Change <br />2006/2007 <br />Perennial Grass 109.1 119.0 170.8 298.1 +42.7% <br />Perennial Forbs 27.1 35.0 31.7 59.4 +46.6% <br />Annual Grass 2.1 16.7 5.9 10.0 +41.1% <br />Weedy Forbs 1.2 9.3 3.4 6.8 +50.0% <br />Shrubs *** *** 92.1 154.0 +40.2% <br />TOTAL *** *** 303.9 528.3 +42.8% <br />Table 6.5 - PI li t Species Composition for Native Rangeland <br />July 2007 <br /> 2006 Species <br />Com osiiion % 2007 Species <br />Composition % % Change <br />2006/2007 <br />Perennial Grass 56.9 56.4 -0.9% <br />Perennial Forbs 10.5 10.9 +3.7% <br />Annual Grass 1.9 1.9 0.0% <br />Weedy Forbs 1.1 1.7 +35.3% <br />Shrubs 29.6 29.1 -1.7% <br />Total production from native rangelands continues to steadily increase over the past 4 years. <br />Ground cover values (Table 6.3) and plant species compositions (Table 6.5) over this same <br />period have remained virtually constant. Increased growing season moisture over this period has <br />resulted in increased vegetative growth from established mature plants while the cover and <br />composition contributed by these plants has remained fairly constant. <br />Monitoring of Reclaimed Well Pad Sites <br />Above ground biomass production, plant species composition and ground cover data were <br />collected from three reclaimed well pad sites, lA-41-1I, 3A-4H and 4-31-1, on September 7 & 8, <br />2007. The data were collected from within ten 9.6 square foot quadrates within each reclaimed <br />well pad at the peak of production for most of the plant species used in reclamation. Biomass <br />production was measured using a double sampling procedure of estimates adjusted by actual <br />values from representative samples. Three of the ten quadrates within each reclaimed well pad <br />were estimated then clipped to derive an actual green weight correction factor used to adjust <br />estimated green weights. Clipped samples were oven dried to obtain an air dry weight correction <br />factor for green weights. <br />Table 4 shows a summary of the ground cover data collected from the three reclaimed sites in <br />comparison to the ground cover data collected from nearby native rangelands. The ground cover <br />17