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Table 9. Mean production ± the standard deviation (S. D.) for the reference area big <br />' sagebrush community. Samples collected in July 1980. n = sample size. <br />Mean Production Mean Production Percent of <br />Species (grams/m2)~S. D. (lbs/acre)±S.D. Total Biomass <br />n=30 n=30 <br />PERENNIAL GRASSES <br />AND SEDGES <br />Agropyron smithii 1.991 ± 1.614 18 ± 14 1.92 <br />Bouteloua gracilis 0.002 ± 0.010 <1 ± <1 <0.01 <br />Calamagrostis montanensis 0.534 ± 0.637 5 ± 6 0.52 <br />Caret heliophila 0.282 ± 0.455 3 ± 4 0.27 <br />Carer spp. 0.664 ± 1.241 6 * 11 0.64 <br />Festuea idahoensis 5.609 ± 3.027 50 ± 27 5.42 <br />Juncus arcticus 0.055 ± 0.133 <1 ± 1 0.05 <br />Xoeleria macrantha 1.340 ± 1.499 12 ± 13 1.29 <br />Muhlenbergia riehardsonis 0.110 ± 0.602 1 ± 5 0.11 <br />Poa sandbergii <0.001 <1 <0.01 <br />Poa sp. 0.027 ± 0.146 <1 * 1 0.03 <br />Sitanion Zongifolium 0.189 ± 0.536 2 ± 5 0.18 <br />Stipa comata 0.107 ± 0.334 1 ? 3 0.10 <br />tipa pinetorum 4.335 3.842 39 ± ~ 34 4.19 <br />Sub-Total 15.245 ± 5.358 136 ± 48 <br />ANNUAL FORBS 1.334 ± 2.782 12 ± 25 1.29 <br />PERENNIAL FORBS 6.583 '- 5.501 59 ' 49 6.36 <br />Sub-Total 7.917 5.560 71 50 <br />SE~7I-SHRUBS <br />Cutierrezia sarothrae 4.099 ± 5.177 37 ± 46 3.96 <br />SHRUBS <br />Artemisia tridentata 74.783 ± 30.572 667 t 273 72.22 <br />Chrysothamnus nauseosus 0.276 ± 1.513 2 *_ 14 0.27 <br />Chrysothmmzus parryi 0.952 ± 2.354 8 ± 21 0.92 <br />Chrysotha~mzz~s viscidiflorus 0.271 ± 0.658 2 *- 6 0.26 <br />Sub-Total 76.282 30.619 681 ± 273 <br />TOTAL PRODUCTION <br />103.543 ± 27.891 924 .249 <br />I~-9'~ <br />25 <br />