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<br /> <br /> <br /> <br />An irrigation system was established on the test plot in July 1977. <br />The system was not designed to give uniform coverage and supplementary <br />water was applied by CF&I personnel without proper record keeping. <br />Because of these difficulties, an accurate assessment of the water <br />applied to each treatment is not available. <br />The plot was damaged in the fall of 1977 by the •unauthorized grazing <br />of livestock. CF&I erected a fence in the spring of 1978 around the <br />perimeter of the test plot and no further livestock grazing has occurred. <br />Vegetation sampling was conducted in October of 1977 and June of <br />1978 to assess the vegetative response during the first and second grow- <br />ing seasons. The plant responses measured were maximum height, density, <br />,and cover on randomly spaced quadrats. Following the 1977 growing season, <br />the seeded plants in Treatment 5 (120# N/a), Treatment 3 (60# N/a), and <br />Treatment 6 (120# N/a with excelsior mulch) had the best growth response. <br />There was no significant difference (P<.05) between any treatments. <br />Manure was removed from the analysis because of the extreme heterogeneity <br />of variance ih~this treatment. <br />Results <br />All Canon City subplots produced vegetation with higher cover values <br />and more diversity than was observed on adjacent untreated dolomite <br />waste areas. Applications of phosphorus, potassium, and nitrogen fertil- <br />izers in conjunction with seeding of desired species appears to account <br />for the differences between the study plot and untreated areas. <br />The treatments with seeded vegetation demonstrating the best growth <br />response following the 1978 growing season were Treatment 3 (60# N/a), <br />