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N'i!d!r/e Upland Reference Area -Cover, Production and Woodv Stern Pertsrry <br />• (2) <br />~ ~ <br />/" S" <br />Nmin - <br />(d x)z <br />Where: <br />N = required number of transects or quadrats <br />d = desired level of precision (0. I the level of precision for estimate <br />of the Mean to be within ] 0% of the actual mean) <br />x = sample mean <br />s' = sample variance <br />t = the a = .10 t-table value for a single tailed t-test with n-1 <br />degrees of freedom <br />• 2.4 Herbaceous Production <br />Herbaceous production was determined by hand clipping 0.5 squaze meter quadrats oriented to the <br />reaz and lefr of the cover transect origin. Vegetation was clipped by forb or grass species with the <br />corresponding "wet" weight recorded. Only perennial species were encountered within the quadrats, <br />thereby eliminating the need to sepazate by life form. The clipped vegetation was then oven dried <br />and re-weighed as a field "dry" weight. The dry weights were converted to pounds per acre. The <br />Snedecor-Cochran sample adequacy formula (Equation 2) was utilized to determine that an <br />adequate number of quadrats aze sampled. Sample adequacy was reached upon completion of 23 <br />plots. <br />2.5 Woody Stem Density <br />Woody stem density was estimated by locating a 5 meter by 5 meter (25m'-) plot along the right side <br />of the transect tape between meters 18 and 23. The starting point of 18 meters was randomly <br />determined prior to initiation of the first transect. Each live, individual shrub or sub-shrub within <br />a plot was recorded. Sample adequacy was not evaluated since a standazd of 1,000 stems per acre <br />is applied to reclamation on upland wildlife habitat. <br />r 1 <br />U <br />lover Produa~on Dmsiiy - Eah 15-626Wuvvnmba 5. 1999 <br />