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Table 15. TRENDS IN MEAN COVER FOR THE PORTION OF THE RECLAIMED AREA SEEDED IN 1988. WALDEN COAL <br />PROJECT SITE. BASED ON DATA COLLECTED BETWEEN 1989 AND 1997. MEAN COVER VALUES IN PERCENT. <br />w <br />A <br />fear 1989 1990 1991 1992 1993 1994 1995 1996 1997 <br />Sample Size 14 14 14 l4 14 14 14 14 20 <br /> <br />COOL SEASON PERENNIAL GRASSES <br />Agropyron dasystachyum 6.57 17.57 9.86 18.43 20.00 13.00 8.14 9.71 4.40 <br />Agrostis scabs 0.00 <0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 <br />Agropyron smithii 2.29 3.57 1.57 0.57 0.57 0.57 0.00 0.14 0.05 <br />Agropyron spicatum 0.00 <0.01 <0.01 <0.01 <0.01 <0.01 0.00 0.00 0.00 <br />Agropyron trachycaulum 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 <br />Ceratochloa marginate 0.00 0.00 0.00 0.00 0.00 <p.01 0.00 0.00 0.00 <br />Deschampsia caespitosa 0.00 <0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 <br />Festuca idahoensis 0.00 0.00 0.00 0.00 1.14 0.00 0.00 0.00 0.00 <br />Hordeum jubatum 0.00 <0.01 <0.01 d).Ol 0.00 0.00 <p.01 0.00 0.00 <br />Koeleria macrantha 0.00 0.00 0.00 0.00 <p.01 0.00 0.00 0.00 0.00 <br />Oryzopsis hymenoides 0.00 <0.01 <p,01 <(1.01 <p.01 0.14 <0.01 <0.01 0.00 <br />Poa ample 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 <br />Poa compressa 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 <0.01 <br />Poa secunda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 <br />Stipa Columbiana 0.00 0.00 0.00 0.00 0.00 0.00 <0.01 0.00 0.00 <br />Stipa viridula 0.43 0.00 0.00 <0.01 0.00 0.00 0.00 0.00 4.50 <br />Subtotal 9.29 21.19 11.46 19.18 21.89 13.71 8.17 10.00 4.50 <br /> <br />INTRODUCED PERENNIAL GRASSES <br />Agropyron cristatum 0.00 <p.01 0.00 <0.01 0.14 <p.01 <0.01 <p.01 <p.01 <br />Alopecurus pratensis 0.00 3.00 <p.01 1.29 1.00 0.71 0.86 0.14 0.10 <br />Bromus inermis 0.00 0.00 0.00 <0.01 0.00 0.00 <p.01 <O.OI <0.01 <br />Elymusjunceus O.14 3.43 3.86 9.57 9.57 8.7I 21.57 15.14 17.05 <br />Fesfuca ovine 0.00 2.14 2.86 <p.01 0.43 3.71 0.57 0.71 0.25 <br />Subtotal 0.14 8.58 6.72 10.89 11.14 13.71 23.02 16.00 17.40 <br /> <br />ANNUAL GRASSES <br />Bromus tectorum 0.00 <0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 <br />Subtotal 0.00 <0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 <br />