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Only species density by vascular plants are included. Lifeforms used include: <br />Annual/biennial forbs <br />Annual grasses <br />Perennial forbs <br />Perennial cool season grasses <br />If the index of similarity between the species density within the specified lifeforms of the reclaimed and <br />reference areas exceeds 63%, then Test C is passed. <br />Alternative Test D): Native Species Presence Assessment <br />The third alternative assessment of the species diversity of reclaimed lands makes direct reference to the <br />presence of native western North American plant species in reclaimed areas. <br />Total cumulative # of native species* 2 avg. reference area native species density (# species / 100 <br />sq.m.) <br />"in the cumulative presence data from 2 m x 50 m samples associated with the collection of a statistically <br />adequate sample of the reclaimed area and including alfalfa and/or cicer milkvetch, which have often <br />been included in seed mixes as nitrogen—fixers, due to the lack of suitable and available native nitrogen - <br />fixers. <br />If the total cumulative number of native species in the reclamation sampling exceeds the average number <br />of native species per 100 sq.m. in the weighted average of the reference area sampling, then Test D is <br />passed. <br />Woody Plant Density Evaluation <br />The criterion for formal judgment of the adequate stocking of woody plants on the Seneca IIW site is as <br />follows: <br />Overall average (background) density z 200 stems per acre on un -fenced reclaimed land (Mandatory <br />Standard 1) with at least 10% of the un -fenced acreage, comprised of non -fenced remnants of planted <br />woody plant density concentration areas and volunteer density portions of the bond release block, <br />possessing >_ 1000 stems per acre (Mandatory Standard 2). <br />11 <br />