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<br />VEGETATION SAMPLING FOR 1992 <br />.............. ....:.::.:::.::~:~:::i:;:.:u::F:Ai':.i::is~'%~.i::i::;a:'."..~.:~,'v'.c.'v::..::...;.),:::::a::.,:::.•;.:;.::i:.:::6'.:..;...::;vi:: [....: . <br />' Methods <br />Vegetative cover sampling was conducted on 12 and 13 August, 1992 using 30-meter (100 ft.) <br />point-intercept transects. The actual number of transects conducted in each sampling areas was <br />' determined using the Snedecor-Cochran sample adequacy formula (Equation 1). <br />rZ sZ <br />' N = - <br />(~)z <br />Where: (1) <br />N = required number of transects or quadrants, <br />t = the ti61e value for adouble-tailed t-test with n-1 degrees of freedom at the <br />' - 40% confidence level, <br />s2 sample variance, <br />d = 0.1 (the level of precision for estimate of the mean to be within 10% of the <br />' - actual mean), and <br />x sample mean. <br />' Ten transects were randomly located within both the reference and reclaimed areas. Data from <br />the transects were used to determine sample adequacy. Sample adequacy was reached on each <br />area in ten transects. <br />Ground cover was evaluated along each transect at 0.3-meter (1 ft.) intervals. Cover was <br />classified as vegetation, litter or rock. Lack of cover was classified as bare soil. Vegetation <br />was further classified by species. Each transect consisted of 100 point samples. Each point was <br />determined by projecting an ocular sighting device vertically downward to the sample location <br />on the transect and recording all "hits" on vegetation. The "hits" were used to estimate total <br />' vegetative cover for each transect according to Equation 2. <br />Percent Tota! Veg. Cover No. hiu on vegetation (2) <br />total number of points <br /> <br />1 <br /> <br />2 <br /> <br />