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<br />Kent Gorham <br />June I5, 2000 <br />t Page 3 <br />(1) <br />Percent Tota! Vegetative Cover =Number of Hits on Vegetation <br />Total Number of Points <br />' Ten transects will be initially evaluated for success comparison and statistical evaluation purposes. <br />The Snedecor-Cochran sample adequacy formula (Equation 2) will be utilized to determine that an <br />' adequate number of transects are sampled. <br />(2) <br />_ tZ s2 <br />' Nmin - ld X)2 <br /> <br />' Where: <br />N required number of transects or quadrats <br />d desired level ofprecision (0.1 the level ofprecision for estimate ofthe <br />Mean to be within 10% of the actual mean) <br />' z sample mean <br />sZ sample variance <br />t = the n = .10 t-table value for a single tailed t-test with n-1 degrees of <br />' freedom <br />Herbaceous Production Sampling <br />' Herbaceous production on the irrigated pastureland will be determined by hand clipping six 0.1 <br />square meter quadrats along each randomly located Iransect (Figure 1). Plots will be place to the <br />right side of meter-marks 0, S, 10, 1 S, 20, and 25. The vegetation will be clipped by forb or grass <br />species and separated by annual or perennial life form, with the corresponding `vet" weight <br />recorded. The clipped vegetation will be oven dried and re-weighed as a field "dry" weight. The <br />dry weights will be converted to pounds per acre for each sampled area. The six production plots <br />clipped along each transect will be averaged into a production value per transect before being <br />evaluated for success comparison and statistical evaluation purposes. Productivity on the irrigated <br /> <br />