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Table 6. (cont.) TRENDS IN COVER FOR THE RECLAIMED AREA AT THE WALDEN <br />COAL PROJECT SITE. BASED ON DATA COLLECTED IN JULY, <br />1989-1992. MEAN COVER VALUES ARE IN PERCENT. <br />Species 1989 1990 1991 1992 <br />SEMI-SHRUBS OR HALF-SHRUBS <br />Artemisia frigida 0.00 0.01 0.10 0.01 <br />Subtotal 0.00 0.01 0.10 0.01 <br />SHRUBS <br />Artemieia tridentata 1.40 2.80 3.60 4.00 <br />Ceratoidee Janata 0.00 0.01 0.01 0.01 <br />Chryeothamnue nauseosus 0.00 0.00 0.01 0.01 <br />Purahia tridentata 0.00 0.00 0.00 0.01 <br />Sarcobatus vermiculatus 0.00 0.00 0.00 0.01 <br />Subtotal 1.40 2.81 3.62 4.04 <br />LITTER 54.00 37.30 49.90 40.20 <br />ROCK 0.20 0.00 0.20 0.00 <br />TOTAL VEGETATION 18.40 30.80 18.60 29.50 <br />LITTER/ROCK 54.20 37.30 50.10 40.20 <br />BARE SOIL 27.40 31.90 31.30 30.30 <br />TOTAL COVER 72.60 68.10 68.70 69.70 <br />No. Species/Sample 3.35 4.35 3.15 3.50 <br />-17- <br />