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! 21 <br />• Treatment 1: 15 cm of topsoil + straw mulch <br />i <br />Treatment 2: No topsoil + excelsior mulch <br />} Treatment 3: No topsail + straw mulch <br />1 <br />All treatments were fertilized with 66 kg N per hectare and 220 kg P205 <br />per hectare, which was raked into the Soil. The plots were broadcast seeded <br />at a rate of 43 kg of pure live seed per hectare (1450 PLS per m2). The <br />seeding mixture is included in Table 6. Seeding was performed in late <br />October 1977. Mulch was applied as either straw or as excelsior mat. <br />Straw was applied at 2240 kg/ha and secured in place with a woven wood <br />matting. <br />j Results and Discussion <br />• Main Plot <br />The vegetation of the Purgatoire River Valley surrounding the Allen <br />Mine is dominated by grasses in pastures and meadows. 'dithin the `lain <br />Plot, grasses ~.vere found to he the principle component of the seeded vege- <br />' tation. Grasses comprised 70 percent of the total canopy cover, forks <br />accounted for 4.1 percent of the canopy cover, shrubs contributed less <br />than one percent, and invading species totaled i.2 percent of the cover. <br />To tai cover for all species averaged 1i.2 percent. The grasses, fortis, <br />and shrubs showing the best growth are found in Table 7 . <br />Mulched *_reatments were nicker in values for cover and density than <br />the unmulc.hed treat~ent and controls. "lulch appears to enhance the growth <br />of seeded species by decreasing the evaooratien of moisture `rpm the soil <br />surface, reducing randroo splash erosion, increasing water infiltration, <br />• _ hindering the growth of invading species and moderating surface tempera- <br />tures. Treatment 7 (66 kg N/ha with straw mulch) provided vegetation with <br /> <br />