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<br />1 <br />Annual forb cover was loev, averaging 0.3 percent absolute <br />cover. This was comprised entirely of yellow sweetclover which was <br />relatively abundant on score slopes. Other species present included <br />Fremont goosefoot IChenopodium ~faemoa#ii), narrov;leaf goosefoot <br />' ICheno/x>dlum .(ep#ophy.l.(uml, and skyrocket gills 17pomopa.ie ugg~egn#nl. <br />Other minor plant species are listed in Table 6. <br />' Production <br />Total average herbaceous production was 48.6 g/3 m2 or about <br />144 Ibs/acre.p~ Perennial graminoids provided most of this production <br />t with 33.4 g/3 m2. The major producers were sideoats gram-r 111.0 g/3 m21, <br />blue grams 17.7 g/3 m21, and mountain rnuhly-'(4.0 g/m21. Other prevalent <br />species were western wheatgrass„ green needlegrass, elk sedge ,. and red <br />' threeawn.~ Total forb production averaged 10.6 g/3 m2. See Table 7. <br />Shrub Density <br />' Total shrub density averaged 15.6 shrubs/50 m2 or 1,264 d <br />Shrubs/acre."' Gambel's oak was the dominant species wiTh 9.7 shrubs150 m2. <br />Other important species were mountain mahogany (2.9 shrubs/50 m21, <br />' mountain snowberry 10.8 shrubs/50 m21, and skunkbush sumac I~u~ aaamn#i ca) <br />with 0.5 shrubs/50 m2 ITable 81. <br /> <br /> <br /> <br />1 <br />LJ <br /> <br /> <br /> <br /> <br /> <br />Shrub heights ranged from about 30 cm to more than 200 cm <br />for the taller Gambel's oaks, and generally averaged about 1 m in height. <br />Tree Density <br />Total tree density for the Pinyon-Juniper Woodland Complex <br />averaged 13.8 trees/250 m2 or 256 trees/acre. Pinyon pine was the most <br />common with 10.5 trees/250 m2 and one-seed juniper was second in abun- <br />dance with 2.0 trees/250 m2. Ponderosa pines were scattered sporadically <br />and averaged 0.8 trees/250 m2. Rocky N~ountain juniper and Douglas-fir <br />averaged only 0.3 and 0.1 trees/250 m2. <br />Estimated tree heights ranged from about 2 to 5 m for pinyon <br />pine, averaging about 3 m. Ponderosa pine and Dougfas-fir were taller, <br />with estimated heights ranging from about 5 to 20 m. <br />3.2..3 Disturbed Land <br />The disturbed lands, including newly revegetated areas, were <br />not sampled. Several seed mixes have been used for the revegetated areas, <br />but the most common species are cool season bunchgrasses such as tall <br />wheatgrass IAgaopy~c~n e.longatLml, pubescent wheatgrass IAgaop~~on <br />L¢ichophoauml, slender wheatgrass (Agnopynon t~eochyenu.(uml and crested <br />wheatgrass (A~nopynon deeex#oauml. The meadow area immediately west of <br />the mine office, and adjacent to the main access road, was seeded at some <br />time in the past with primarily smooth brome (!3¢omop~i~ iaeiunial and tall <br />wheatgrass. <br />-10- <br />