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nearest 0. 10 gram and reported in g /m and lbs. /acre. Clipped <br />samples less than 0.10 gram shall be reported as trace samples. <br />Average bag weight shall be calculated and subtracted from <br />weighed samples. <br />Woody Plant Density Data Collection <br />Woody plant density data will be collected at random locations on <br />reclaimed areas in conjunction with cover transects. A 2 -meter <br />wide by 50 meter or 4 -meter by 25 meter long belt transect <br />(depending on distance to next sample point) will be established in <br />the direction of the next sampling point. Then within each belt, all <br />woody plants (shrubs, trees, sub - shrubs, and succulents) will be <br />enumerated by species. On sampling areas smaller than 1.5 <br />acres, total counts of live shrubs may be conducted. This would <br />require systematically walking the entire unit and recording every <br />live shrub within that unit. Stem count will be recorded by species <br />and reported as stems per acre. No shrub height measurements <br />will be taken. <br />Sample Adequacy <br />Sample adequacy calculations for reference and reclaimed area <br />cover, production and woody plant density sampling will utilize one <br />of the following formulas. The following formula will be used for <br />reference and reclaimed area sampling when hypothesis testing is <br />not required. <br />N t 2 S 2 /(dx) <br />Where: <br />N = Minimum number of samples required <br />S = Sample variance <br />d = Precision (.10) <br />x = Sample mean <br />t =The (a =.1 0) t -table value for a single tailed t -test <br />with (n -1) degrees of freedom <br />TR -60 14 -21 (Rev 03/11) <br />