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~~ <br />COLOWYO COAL COMPANY L. P. <br />SECTION 16, 1998 RECLAIMED AREA <br />HERBACEOUS FREQUENCY/DENSITY RELATIONSHIP -TOP TWENTY SPECIES <br />JULY, 1999 <br />NUMBER SPECIES HITS(1) FREQUENCY(2) DENSITY(3) <br />1 Salsola iberica 186 69-75-80 1.171-1.386-1.609 <br />2 Bromus marginatus 130 46-52-58 .616-.734-.868 <br />3 Thalspi arvense 124 44-50-56 .580-.693-.821 <br />4 Cerastium arvense 118 42-48-54 .545-.654-.777 <br />5 Bromus japonicus 61 20-25-31 .223-.287-.371 <br />6 Taraxicum officinale 59 19-24-30 .211-.273-.357 <br />7 Polygonum aviculare 54 17-22-28 .186-.248-.329 <br />8 Chenopodium capitatum 51 15-20-26 .163-.223-.301 <br />9 Linum lewisii 46 13-18-23 .139-.198-.261 <br />10 Achilles millefolium 42 12-17-20 .128-.186-.223 <br />11 Agropyron spp 40 11-16-21 .117-.174-.236 <br />12 Penstemon spp 28 7-11-16 .073-.117-.174 <br />13 Amaranthus blitoides 27 7-11-16 .073-.117-.174 <br />14 Cirsium vulgare 27 7-11-16 .073-.117-.174 <br />15 Stellaria jamesiana 22 5-8-12 .051-.063-.128 <br />16 Artemisia spp 20 5-8-12 .051-.083-.128 <br />17 Poa pratense 19 5-8-12 .051-.083-.128 <br />18 Amelanchieralnifolia 18 4-7-11 .041-.073-.117 <br />19 Brome spp 18 4-7-11 .041-.073-.117 <br />20 Lappula occidentalis 16 3-6-10 .030-.062-.105 <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 F~Qu_e~y-Dgn~ity Relationship table. <br />