Laserfiche WebLink
<br /><• <br />New Noriznrr Mine: 2007 Vegetarian Sampling for Phase 3 Brnd R'eleasa <br />Therefore, Countable Live Vegetation Cover in the Dryland pasture redaimed area is 28.4 - 2.0 <br />= 28.49'°. <br />Production measurements and summary statistics are shown in Table A12. We sampled 35 <br />plots and sample adequacy was not demonstrated, due to the high variability of production <br />among sample plots. Cover and production estimates are summarized and compared in Table <br />3. <br />Table 3. Canparisarl ar mean mover and production between the Dryland Pasture redaimed areas <br />eligible for Phase 3 band release and the Dryland Pasture n3ference area. <br /> Dryland Pasture Reclaimed Area, Dryland Pasture Reference Area <br /> Phase 2 Band Release Standard <br /> Mean # of Sam las Mean Q* # of Sam ies <br />Cover (9'0) of 26 4 22 30.0 (27.0) 21 <br />Countable Live <br />Ve atian** <br />Prnduction (ibfacre) 301.3 35 15.3 1( 35_3j 49 <br />*Q is the value that must be equaled or exuded for revegetation to be deemed sucaessiul, and is equal <br />to 90°I° of the standard. ' <br />"See ex~anation to text. Actual cover was 28,4%, but only 26.4% is countable for Phase 3 bond release <br />purposes because of CORMS limit nn oaanting five annual plants. <br />Comparisons !o Standards: <br />Cover, Mean cover of countable live vegetation in the Phase 3 reclaimed area {26.4) was <br />slightly less titan Q {90°1a of 30.0 = 27.0}. Because sample adequacy was met in bath areas, <br />means were compared using eons-sample "standard null" t-test (statistical procedure #2 in <br />*Clefinif'sans'ssction above}, as follows: <br />• Equation 5 r~ ~ S`s <br />wig: <br />s ~ Bad Release Stock Sampb Mean <br />Q 6 9g9e afSnuidard <br />• S. = S~andsrd error of snenn [.r! f ] <br />S + ~ Santp3r. 8randazd devixttron <br />n = S.unpt° six <br />• t, _+ Calnutatmt t value <br />a T'atite t t'atUC <br />The null hypothesis being tested is that the mean cover at fhe reclaimed site is greater than or <br />equal to Q, with 90% statistical confidence. if tc is less than or equal to the t-tailed i table value <br />for alpha error probability of 0.10, at n-1 degrees of freedom (tnfin'tte degrees of freedom may be <br />used if n > 30}, then the null hypothesis is not rejected, and revegetation is deemed successful. <br />6f0.Loglc Enrtronmenrat <br />November 12, 2Oa? <br />Attachment 1-10 <br />10 <br />