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Sample adequacy will be tested during field sampling using the formula in DRMS Regulation <br />4.15.11(2)(a), as follows: <br />t 2 S 2 <br />n Wy <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; 0.15 for woody <br />plant density) <br />x = Sample arithmetic mean <br />t = The (a =.10) t -table value for a 1 tail t -test, n -1 degrees of <br />freedom (infinite degrees of freedom may be used if n> 30) <br />n = Sample size <br />As are recommended in Rule 4.15.11(2) & (3), during field sampling for cover at least 15 samples <br />(observational units) will be made at each site. For production sampling at least 30 transects will <br />be sampled from each area. Sample adequacy will be tested after 15 cover and 30 production <br />samples are taken. Sampling may continue if necessary to reach sample adequacy, or sampling <br />may be terminated before sample adequacy is reached if an alternate statistical method (approved <br />by the DRMS such as the reverse null test) can be used that does not require demonstration of <br />sample adequacy. A maximum sample size of 50 transects will be used in all revegetation <br />monitoring. Alternative procedures will require a minimum of 15 or 30 transects, as detailed below. <br />Because dry- weight production data will not be available until samples are air -dried in the <br />laboratory, sample adequacy will initially be calculated on fresh weights of clipped material, then <br />recalculated later for air -dried material. <br />Reclaimed area cover and production will be compared to a standard equal to the mean values <br />measured at the reference area by sampling, as described below. Revegetation will be considered <br />"successful" if the mean value for the reclaimed site can be demonstrated to equal or exceed "Q" <br />(Q =90% of the standard). One of the following four methods will be used to compare mean values <br />at reclaimed sites to Q, depending on the mean values and whether sample adequacy was reached <br />during sampling. <br />(June 2013 MR 86) 2.05.4(2)(e) - 61 <br />Mu -L%, <br />- Pprowd <br />j-e ;,L1n , .2013 <br />