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<br />~ ~ adequate numbers were approached in relation to established <br />r <br />confidence intervals. <br />I-2.2.3 Sampling Adequacy <br />--- The number of samples required for estimating cover, <br />production, snd density were determined using the formulas <br />presente3 in Appendix A. Determination of the actual number <br />of exclosures to be erected was based on past experience <br />,.. in similar vegetation types. Sample adequacy attained for <br />cover, production and shrub and tree density was calculated. <br />I-2.3 Cover <br />_ The understory vegetative cover in each vegetation type <br />`• was visually estimated in a one-meter squared plot. Cover <br />-- was determined for each herbaceous species (including shrubs <br />` with less than 1.0 inch stem diameter) by assuming a position <br />directly over the quadrat and estimating the percent of ground <br />` surface covered by live, above ground biomass. The remaining <br />_ area in the quadrat covered by litter-rock in place and bare <br />ground was also estimated. Cover estimated in this way may <br />exceed 100 since vegetation layers result in species overlap <br />over the same ground arcs. <br />Cover was also estimated for the evaluation of erosion. <br />_ This estimate is called Total Cover in the tables and is <br />_. <br />-7- <br />