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Time of Sampling <br />All plots were sampled during the fourth week of June, 1981. <br />• <br />Plot Size and Shape <br />Cover and production data were obtained using a 1/2 x 2m rectangular <br />quadrat. Shrub and tree density data were obtained in the pinon-juniper type <br />using a 50m2 plot. A lOm2 plot was used in the mixed shrub type. <br />Measurements <br />Fifty plots were randomly Selected in each inventory area for the collec- <br />tion of cover and production data. Measurement of cover was obtained by <br />ocular estimation of overstory vegetation, litter (standing and ground), rock <br />(greater than 2cm2) and bareground, to the nearest whole percent. Herbaceous <br />• species (excluding shrubs, trees and succulents) within the plot were then <br />clipped and bagged separately, oven-dried at 105°C and weighed to the nearest <br />tenth of a gram. <br />Density measurements for shrubs and trees were obtained at 25 quadrats <br />within each inventory area. All shrub and tree species with heights greater <br />than 5 in. tall (thus eliminating a count of seedlings) and rooted within the <br />quadrat were tallied and recorded. <br />Data Analysis <br /> <br />Vegetative cover in each inventory area was computed as the mean percent <br />overstory cover of all species in all plots within each area. Total cover was <br />computed as the mean percent of overstory vegetation. plus litter plus rock in <br />• all plots within each inventory area. Cover by a species estimated to be less <br />than one percent was recorded as 0.5%. <br />-3- <br />