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<br />during sample site location (see Figure V-1). From within each quadrat, all above ground current annual <br />vegetation, excepting woody species, within the vertical boundaries of the frame were clipped and <br />bagged separately by life form as follows: <br />Perennial Grass Perennial Forb Noxious Weed <br />Annual Grass Annual / Biennial Forb Sub-shrub <br /> <br />• <br />All production samples were returned to the lab for drying and weighing. Drying occurred at 1050 C <br />until a stable weight was achieved (24 hours). Samples were weighed to the nearest 0.1 gram. <br />2.5 Determination of Woody Plant Density <br />At each sample site that included a ground cover measurement in the baseline area and at 30 of the <br />typical 40 production sample points in the reference areas (skipping points divisible by 4), a co-located 2- <br />meter wide by 50 meter long belt transect was established in the direction of the next sampling point <br />(typically along a cardinal compass direction - see Figure V-1). Then within each belt, all shrubs, sub- <br />trees (e.g., Gambel's oak) and trees were enumerated by species. Determination of whether or not a <br />plant could be counted was dependent upon the location of its main stem or root collar where it exited <br />the ground surface. with regard to belt limits. Sample adequacy was determined for informational <br />purposes only. <br />2.6 Determination of Aspen Density & Canopy Cover <br />As with woody plant density, informational data was collected for Aspen density and canopy- cover. <br />At each ground cover sample site in the Aspen reference and baseline areas, the point-center-quarter <br />(PCQ) method was employed to determine aspen (Populus tremuloides) density. At each sample point, <br />the surrounding area was horizontally divided into four quarters (quadrants) using the cardinal compass <br />directions (northeast, northwest, southeast, and southwest quadrants). Within each quadrant, the <br />distance to the nearest aspen (at least 5 feet in height) from the sample point was measured to the <br />nearest foot (Y;). Using the following equation, an aspen density was determined from these four <br />measurements: <br />Aspen Density (/ft2) = 3/[TT(Y12+ Y22+ Y32+ <br />Y42)/4] <br />CIZOARCREEK AMCC TES, INC. Page 9 2005 Collom Vegetation Survey