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r <br />r <br />1 <br />1 <br />1 <br />i <br />1 <br /> <br />t <br />1 <br />1 <br />1 <br /> <br />1 <br />1 <br /> <br /> <br />1 <br />Vegcmeon Sampfing For 7992 <br />1992 to 1993, even surpassing annual forbs as the dominant vegetation form on plot 1. <br />Other life forms contributing small portions of cover during 1993 included annual grasses <br />and perennial forbs. As in 1992, no shrubs were recorded in the belt transects during 1993. <br />There was a significant decrease in total vegetation cover of plot 1 as compared to the other <br />three plots on the north exposure. As previously mentioned, this may be due to steeper <br />slopes or soil cover placement along the eastern edge of the plot. <br />The range of vegetation cover for all test plots during 1993 is wider than in the 1992 <br />sampling (Table 8). Overall, annual forb cover decreased dramatically while perennial grass <br />coverage increased. Although the total vegetative cover has significantly decreased in 1993, <br />the successful establishment of more perennial grasses indicates progression of these plots <br />toward a diverse self-sustaining plant community which will satisfy the revegetation <br />requirements. Total vegetative cover is sparse on those plots having a 48" subsoil layer, <br />especially on the north side, however, this may be due to slope and aspect rather than the <br />cover treatment. <br />Production sampling on the test plots occurred for the first time during 1993. Generally, a <br />mixture of annual and perennial species were encountered, with some plots having only <br />annuals and others only perennials. This data indicates that the plots are in the transition <br />to a self sustaining stand of vegetation. <br />Tables 4 and 5 present the wet and dry production weights by life form for the north and <br />south slopes, respectively. Tables 6 and 7 present the total weights for each plot with the <br />mean for each cover treatment and the sample adequacy calculations. Only one cover <br />treatment (S-2) was sampled to adequacy with 10 clip plots. Due to the variation of life <br />forms and range of weights, it was documented that sample adequacy could not be achieved <br />without clipping a large number of plots (>30). As no comparative data was collected from <br />the reference area and the plots are still in transition from annual to perennial species, it <br />was determined that sample adequacy for production data was not necessary for this data <br />set. <br />Mean dry weight production varied from 51.2 grams on S-1 to 173.3 grams on S-3 and from <br />24.1 grams N-1 to 186.8 grams on N-4 (Table 8). Production was the greatest on plots with <br />the least cover depth, however, it is felt that slope and aspect are the primary factors for the <br />differences. <br />19 <br /> <br />