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Keenesburg Mine Total veg - 49. 5% <br /> Sample date: 8/17/88 Total cover - 74.0% <br /> Location sampled: Area F, 1987 Western Bare soil - 26.0% <br /> Area <br /> Number of transects: 4 <br /> Warm season perennial grasses % Cover % Rel . Cover <br /> n ropogon halm --- --- <br /> - Bouteloua gracilis 4.0 8. 1 <br /> - Calamovilfa longifolia 8.5 17. 2 <br /> - Panicum virgatum --- --- <br /> - Sporobolus asper --- --- <br /> - Sporobolus cryptandrus 4. 5 9. 1 <br /> Cool season perennial grasses <br /> Agropyron cr sstatum --- --- <br /> - Agropyron intermedium 0. 5 1 .0 <br /> - Agropyron smithii 1 .0 2.0 <br /> - Agropyron trahycaulum --- --- <br /> - Bromus inermis 1 . 5 3.0 <br /> - Oryzopsis hymenoides --- --- <br /> Perennial/Biennial Forbs <br /> ac uca serrio a 0. 5 1 .0 <br /> - Medicago sativa 0.5 1 .0 <br /> Annual Forbs (& Grasses) <br /> Unknown annual --- --- <br /> - Helianthus petiolaris 2.0 4.0 <br /> - Kochia scoparium 1 .0 2.0 <br /> - Salsola kali 25. 5 51 .5 <br /> X = 50% S = 6.0 Nmin = 0.6 (20% of true mean with 80% <br /> statistical confidence) <br />