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www.bio-geo.com <br />the number of random sampling points in each of the 2 areas will be proportional to the size of <br />the area. The additional 21.2 acres of First Year Phase 3 eligible lands are adjacent to the <br />130.1 acres of Second Year Phase 3 lands, have been reclaimed and managed in the same <br />manner, and the reestablished vegetation is very similar. Sampling both areas together will <br />provide statistically valid measurements of vegetation in each area, and will of e,raaed-te, <br />?arn "44 V! FlIS1, <br />sads>a?y. , <br />Definitions 4 e ? a 0 cy r? • <br />Cover. CDRNI8' regulations allow cover to be defined as either canopy or basal cover of living PP <br />herbaceous or herbaceous,QLnd. oody vegetation. For this study we use canopy cover of living <br />(6=uiabons baceous and woody veg. For cover measurements on reclaimed lands, CDRMS <br />allow the inclusion of annual grasses and (orbs up to 10% of tot?j?C6tf cover <br />of annuals over 10% of tots over is allowed up to the amount of total cover of annuals <br />measured at the reference ar <br />Production. CDRMS regulations define production (on pasture, rangeland, and for forage <br />crops such as hay) as current year above-ground biomass of herbaceous vegetation. <br />Standard. CDRMS regulations for Phase 3 bond release and the NH-2 permit specify the <br />standard for cover and production as the mean value for the reference area. Revegetation is <br />considered "successful" for the parameter in question if the mean value for the reclaimed area is <br />demonstrated to equal or exceed "Q" (Q=90% of the standard), at the 90% confidence level. <br />2.3 Statistical Procedures <br />Gbrnple adequacy will be calculated using equation 1. A minimum sample size of 15 is required <br />at each site. <br />Equation 1 r .' <br />V O: <br />w lie re <br />a. = minimum sample size <br />s = Sample sariance (n-1 degrees of freedom, <br />d = Pre6mon (0.10 for ctnct and pnxluclion; 0.15 tot wtk)ly <br />plant density) <br />x = Sample arithmetic mean <br />t = The iu= 101 t-table %alnc for a I tail t-test, n-1 degrees of <br />freedom 61t finite degrees of freedom ma% tx used if n>30) <br />n - Sample size <br />Mean values for cover and production will be calculated for each study area. Mean values for <br />each post mine land use type will be compared to the standard (respective reference area <br />means) according to the general procedures described below in the Comparison of Measured <br />Parameters.