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- 2 - <br />species, or as litter, bare ground, or rock. Where shrubs <br />were encountered, shrub canopy cover, as well as shrub <br />ground cover, was measured by reference to the frame. Tree <br />canopy cover was estimated by upward extension of the points. <br />Transects were established until sample adequacy was attained <br />by reference to the fol -lowing formula: - <br />a` z` <br />nmin `— (T -x= -)-r <br />Where: nmin = minimum number of samples required <br />a = sample standard deviation <br />z = confidence level (t.) <br />m <br />d = amount of reduction it is desired to detect <br />x = sample mean <br />• Production Sampling <br />Fifty quadrats, 50 -cm x 50 -cm = 14m were placed in <br />each type randomly along the approximate centerlines. All <br />herbaceous vegetation within each quadrat was clipped and <br />separated by life -form: graminoids and forbs. Samples were <br />air-dried for 10 days and subsequently weighed for the nearest <br />0.1 g, using a metric balance. <br />RESULTS <br />Sampled areas are shown in Figs. 1-4 (Conifer -Shrub <br />Type), Figs. 5-8 (Oak -Shrub Type), and Figs. 9-12 (Reference <br />Area). The reference area which was selected lies on a south - <br />facing bench along the North Fork of the Purgatoire River. <br />Cover data are presented in Appendices A -C, and <br />are summarized in Table 1. Sample adequacy was attained in <br />all types. <br />Production data are presented in Appendices D -F and <br />• are summarized in Table 2. Sample adequacy was attained in <br />