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Only species density by vascular herbaceous plants will be included. lifeforns to be used include: <br />• <br />Annual/biennialforbs <br />Annual grasses <br />Perennial (orbs/ Sabshrn6s <br />Perennial cool season grasses <br />If the calculated index of similarity by lifeform equals or exceeds 90 percent of the standard (0.9 x <br />75°l0 = 67.5%), then Alternative Test C has been passed. <br />Alternative Test D• Assessment of the Presence of Native Species <br />Finally, the assessment of the species diversity of reclaimed lands needs [o make reference to the <br />presence in reclaimed azeas of native western North American plant species. <br />Alternative Test D is conducted as a direct test of the presence of native species in the reclaimed azea <br />as reflected in the cumulative presence of reclaimed azea native spedes within the (usually 10 to 20) 2 <br />m x 50 m plots associated with the spedes density determination that accompanies cover sampling • <br />(see above). The comparison of this cumulative list of spedes found at the covet sample locations <br />would be compazed to the average number of native species found in a sampled stand of the <br />Reference Area (i.e. the average Reference Area density): <br />Total cumulative # of native species* > avg. Reference Area native species density (# <br />species j 100 sq.m) <br />* in the cumulative presence data Erom Zm x SOm samples associated with the collection of a <br />statistically adequate covet sample of the reclaimed area (and including alfalfa andf or cicer milkvetch <br />which have often been included in seed mixes as nitrogen-fixers in light of the lack of suitable and <br />available native nitrogen fixers). <br />Woodv Plant Densit~* <br />The woody plant densities proposed for the reclaimed mining blocks are based on anticipated <br />levels of successful tree and shrub establishment resulting from application of current <br />reclamation technologies. Planting rates have been specified that take into account mortality • <br />levels commonly experienced. Further consideration has been given to environmental, <br />Tft-50 54 Revised 70105 <br />