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of the Soil Conservation Service was contacted for assis- <br /> tance in acquiring additional plant materials for testing, and <br /> a Field Evaluation planting site was established in 1978. <br /> Test plot work was devoted primarily to the major disturbance <br /> areas, since moderate and minor disturbance sites are much more <br /> conducive to vegetative establishment by applied techniques as <br /> well as natural invasion. Plant materials utilized in the revege- <br /> tation test work were selected from species possessing qualities <br /> considered to be essential for success. The selected species were <br /> then tested in single species and mixed species plantings. Spe- <br /> cific qualities selected for included: <br /> Drought resistance <br /> Cold tolerance <br /> Winter hardiness <br /> Vegetative and sexual reproductive rates <br /> Nutrient assimilation <br /> Toxicity tolerances <br /> Competitiveness <br /> Plant materials tested on the various plots were then evalu- <br /> ated for revegetation potential based on vigor and vitality rat- <br /> ings. The most attention was given to those species which dis- <br /> played large ecologic amplitude, capable of desired results in a <br /> number of microsites or habitats. <br /> Floral species used or tested in the reclamation program at <br /> the Silverton site over the past five years are presented in the <br /> subsequent listings. <br /> Page 8 <br />