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+ , <br />COLOWYO COAL COMPANY L.P. <br />SECTION 11, 1998 RECLAIMED AREA <br />HERBACEOUS FREQUENCY/DENSITY RELATIONSHIP -TOP TWENTY SPECIES <br />JULY, 1999 <br />NUMBER SPECIES HITS (1) FRE~UENCY(2) DENSITY (3) <br />1 Thalspi arvense 214 81-86-90 1.661-1.966-2.303 <br />2 Salsola iberica 109 38-44-50 .478-.580-.693 <br />3 Bromus marginatus 105 362-48 .446-.545-.654 <br />4 Agropyron spp 99 34-406 .416-.511-.616 <br />5 Lappula occidentalis 91 30-362 .357-.446-.545 <br />6 Bromus tectorum 86 29-351 .343-.431-.528 <br />7 Bromus japonicus 75 24-30-36 .273-.357-.446 <br />8 Stellariajamesiana 68 21-27-33 .236-.315-.400 <br />9 Cerastium arvense 57 18-23-29 .198-.261-.343 <br />10 Polygonum aviculare 56 18-23-29 .198-.261-.343 <br />11 Agropyron cristatum 43 12-17-22 .128-.186-.248 <br />12 Brome spp 40 11-16-21 .117-.174-.236 <br />13 Amaranthus blitoides 38 10-15-20 .105-.163-.223 <br />14 Agropyron intermedium 37 10-15-20 .105-.163-.223 <br />15 Agropyron smithii 33 9-13-18 .094-,139-.198 <br />16 Lactuca serriola 25 7-10-14 .073-.105-.151 <br />17 Astragalus cicer 24 7-10-14 .073-,105-.151 <br />18 Vicia americans 17 4-7-11 .041-.073-.117 <br />19 Alium textile 16 4-7-11 .041-,073-.117 <br />20 Agropyron trachycaulum 13 3-5-9 .030-.051-.094 <br />Notes: 1) Using a 60x60cm frame tossed 250 times, number of species occurances in frames are recorded. <br />2) Occurances/250 =frequency presented within a 95 %confidence interval . <br />3) Density numbers are then determined by applying the frequency numbers to the attached Frgq ~ n y-D n~igr Relationship table. <br />