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VeRetafion Sampling for 1998 And /999 <br />Percent total vegetative cover for species in each area was the mean of all transects. <br />Production was determined by hand clipping one-half square meter quadrants. During 1998, the <br />sampling point was determined by placing the quadrant to the rear and lefr of the random starting <br />point for the vegetative cover transect. Production sampling for 1999 was altered upon <br />recommendation from CDMG in an attempt to achieve sample adequacy on the reclaimed area. <br />I Both the reference and reclaimed areas were sampled for production by taking three plots per <br />vegetative transect. The plot locations were as follows: plot one to the rear and left of the transect <br />starting point; plots two and three located on the left side of the transect at meters six and twenty- <br />one, respectively. These sample locations were randomly determined upon initiation of the <br />sampling in the field. The vegetation was clipped by forb or grass species and separated by annual <br />or perennial life form, with the corresponding field "wet" weight recorded. The clipped <br />vegetation was then oven dried and reweighed as a "dry" weight. The dry weights were converted <br />to pounds per acre for each respective sample area. <br />1 Sample adequacy for vegetative cover and biomass production within each sampling area was <br />~t determined using the Snedecor-Cochran sample adequacy formula (Equation 3). <br />(3) Nmin = (~sx)_(dX)2 <br />Where: <br />Nm;n = the minimum number of transects or quadrants needed, <br />t = the a = .10 t-table value for asingle-tailed t-test with n-1 degrees of <br />freedom, <br />s2 = the sample variance, <br />d = .1 (level of precision for estimate of the mean to be within 10% of the <br />actual mean), and, <br />z = the sample mean. <br />- Vegetative cover data from the transects were used to determine sample size adequacy. Sample <br />size adequacy was reached during the June 1998 sampling in the reference area with fifteen <br />transects, and in the reclaimed area with twenty-five transects. During the September 1998 <br />reclaimed area sampling event, sample size adequacy was reached in fifteen transects. For the <br />I 1999 sampling event, sample size adequacy was achieved in the reference and reclaimed areas with <br />fifteen transects. Refer to Tables A-1 and A-2 for a summarization of this data. <br />n~a.os5~os5.ivv6•,s~PUmn~~ ~~. ~9vv A-2 <br />I <br />