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• 2.4.4 S36O17 <br />516017 is comprised of 1.5 aces of moderatety sloping revegetation that has a predominately <br />southeasterly aspect. This unit was seeded in 1999 and therefore, has undergone four growing seasons <br />prior to sampling in 2003. A total of 31 plant taxa, including musk thistle, were observed in the unit (see <br />Table 19). <br />Ground cover (Fgure 17) wnsisted of 52.9% five vegetation, 0.6% rock, 0.1% standing dead, <br />22.1% litter, and bare soil exposure of 24.3%. Perennial cover across the unit averaged 29.5% with <br />annual and biennial rnver averaging 23.4%. The dominant taxa were cheatgrass, Japanese brome, <br />mountain brome, thickspike wheatgrass, and orchard grass (Dactylis g/omerata) with 9.0%, 8.7%, 5.7%, <br />3.5%, and 3.5% average cover, respectively. Woody plant density was determined from 15 belt <br />transects andtotaled 178 young and mature stems per acre (Table 2) with big sagebrush the dominant <br />woody plant. With regard to diversity, S16017 exhibited 8 perennial grasses and 1 perennial fort with <br />between 3% and 50% relative cover. <br />Unit 516017 currently passes the bond release diversity standard of 3 perennial grasses and 1 <br />• perennial fort with between 3% and 50% relative cover. This unit should also readily pass the <br />production bond release comparison to the reference areas, and likely the ground cover comparison as <br />well. This unit does not presently meet the woody plant standard of 90% of 1000 stems per acre and <br />will probably not meet this in the foreseeable future. See Appendix AA -Section 7.4 for a discussion on <br />options and recommendations with regard to woody plant density. Noxious weeds appear to be <br />controlled in this unit. Annual bromes currently represent 17% of the ground cover in this unit and these <br />populations should be monitored to gauge if they are expanding or shrinking. If monitoring reveals they <br />are expanding, use of the herbicide Oust or Plateau is recommended. <br />At present, 516017 is progressing well toward satisfaction of all Phase III success criteria, with the <br />only concern the population of annual bromes and the woody plant density. This unit is also a good <br />example of an improved pasture grassland community that would contribute to the local system as <br />foraging habitat for wildlife (espedally elk), as well as provide a variety of management opportunities for <br />livestock grazing. <br />• <br />Kennecolt rnerer co. r Colawyo rune Page 59 Revegetatlon Monttoring -2003 <br />