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Photographic Record <br />Within each area, representative color photographs were taken to document the appearance of the <br />vegetation in 2011 and 2012 (Appendix F). Where appropriate, a placard identifies the particular area and <br />sample. <br />Statistical Methods <br />Sampling was conducted at randomly located sites. Random sampling locations were generated using <br />ESRI ArcMap 9.3 software and Hawth's Analysis Tools for ArcGIS (Beyer 2004). Garmin GPS60 units <br />(accuracy to 3 m) and topographic maps were used in the field to locate random points. Cover and woody <br />plant transects were randomly oriented; production samples were located randomly behind the transect <br />origin. At each cover /woody plant density sampling location, the slope, expressed as a percent, and aspect <br />of the site, in degrees not corrected for magnetic declination, were determined and recorded, as was the <br />orientation of the transect. <br />Assessment of Reclamation Adequacy <br />GENERAL <br />Formal (statistical) hypothesis testing (see below) was undertaken for the Phase III Bond Release Block <br />(post -law, Permanent program lands). <br />DETERMINATION OF SAMPLE ADEQUACY <br />Sample adequacy for the data collected was evaluated based on total allowable live foliar herbaceous <br />cover using the following expression: <br />tz — s <br />n„,— (c7= <br />where: <br />n = minimum sample size <br />s = Sample variance (n -1 degrees of freedom) <br />d = Precision (0.10 for cover and production) <br />x = Sample arithmetic mean <br />5 <br />