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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />Table 7. PRODUCTION SUMMARY FOR THE GRASSLAND REFERENCE AREA AT THE <br />WALDEN COAL PROJECT STI'E. BASED ON 1997 DATA FROM NINETEEN SITES. <br />+J-VALUES EQUAL THE STANDARD DEVIATION. <br /> Mean Range of Percent of <br />Species Production Total <br /> g/sq.m lbs/Acre Values Production <br /> (g/sq.m) <br />COOL SEASON PERENNIAL GRASSES <br />Agropyron dasystachyum 11.95 106 1.36 - 34.77 33.16 <br />Agropyron smithii 0.45 4 0.00 - 4.43 1.25 <br />Calamagrostis montanensis 1.71 15 0.00 - 12.68 4.74 <br />Carex eleocharis 0.88 8 0.00 - 13.39 2.44 <br />Carexfilifolia 0.49 4 0.00- 4.53 1.37 <br />Carex heliophila 0.01 <1 0.00 - 0.24 0.04 <br />Koeleria macrantha 3.68 33 0.00 - 16.23 10.20 <br />Oryzopsis hymenoides 0.26 2 0.00 - 2.00 0.73 <br />Poa sandbergii 0.13 1 0.00 - 0.97 0.36 <br />Shpa tomato 9.67 86 0.00 - 27.19 26.83 <br />Sub-total 29.24 260 81.10 <br />WARM SEASON PERENNIAL GRASSES <br />Bouteloua gracilis 0.58 5 0.00 - 3.07 1.60 <br />PERENNLAL FORBS <br />Astragalus kentrophyta <0.01 <1 0.00 - 0.01 <0.01 <br />Other perennial (orbs 2.41 21 0.00 - 7.26 6.69 <br />Paronychia sessiliflora <0.01 <1 0.00 - 0.01 <0.01 <br />Phlox hoodii <0.01 <i 0.00 - 0.01 <0.01 <br />Sub-total 2.41 22 6.70 <br />SEMI-SHRUBS ORHALF-SHRUBS <br />Artemisia frigida 3.82 34 0.18 - 21.53 10.60 <br />TOTAL PRODUCTION 36.05 321 <br />+/-11.79 +/- 105 <br />-20- <br />