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4.8 Woody Plant Densities - 1987 Woody plant densities were measured in the sagebrush <br />type and willow component of the swale /drainage type using belt transects. All trees, shrubs, <br />sub - shrubs, succulents, and agavoids were included in the counts. A species was counted for <br />density when at least 50 percent of the crown emerged within the belt. A 2m x 25m belt, <br />originating at the randomly - located sample point and extending in a random direction, was <br />used in the sagebrush type. A randomly - located 0.5m x 2.Om belt was used in the willow <br />component of the swale /drainage. This small belt size was selected on the basis of the <br />extremely dense character of the willow thickets. <br />Woody plant densities were measured in the irrigated pasture vegetation type using direct <br />counts from 1" = 500' color aerial photography with field checks for verification <br />4.9 Sample Point Selection - 1999 Individual sample point locations, and belt transect origins <br />were selected using pairs of randomly - generated coordinates. The 1999 vegetation map was <br />brought into ESRI ArcView and a state plane 100 foot interval tic grid was overlaid on the map. <br />Coordinates located within a map unit were listed and exported to Microsoft Access where a <br />random number generator was used to pick pairs of coordinates for sampling locations. The <br />numbers 0 to 359 were also entered into Microsoft Access and a random number generator <br />used to select transect direction. <br />Sample point locations were located from the resultant transects being plotted on the raster <br />digital aerial photo. The observer then walked to that point using visible landmarks. Once the <br />vicinity of the sample point was found, a orange spike was thrown over the observer's shoulder <br />to identify the exact location where the sampling point would be located. <br />4.10 Vegetation Cover and Frequency - 1999 Quantitative measurements of vegetation <br />cover and plant species frequency were made in the sagebrush - 1 (SG -1), sagebrush - 2 (SG- <br />2), sagebrush reference area, dryland pasture reference area, irrigated pasture and <br />swale /drainage vegetation types. <br />Vegetation cover data was collected in the sagebrush type by the point- intercept technique <br />applied by use of an laser point bar. The data was collected on July 13 through 20, 1999. The <br />August 2013 (PR 08) 2.04.10 -21 <br />