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<br />L~ <br /> <br />reclaimed areas. It is likely that as seed mixes and seed quality develop to the point of <br />eliminating the aggressive introduced species (especially intermediate wheatgrass and smooth <br />brume), the opportunity for slow enlargement of the numbers of native perennial fortis will grow. <br />It is suggested that each year, the particular lots of western wheatgrass and mountain brume <br />(Ceratochloa marginata) a seller proposes to provide be sampled and submitted to a independent <br />seed laboratory for determination of the presence of intermediate wheatgrass and smooth brume, <br />respectively. If present, those lots should be rejected and alternative lots tested until a clean lot is <br />located. It is highly likely that intermediate wheatgrass, vegetatively so similar to western <br />wheatgrass, is mixed in lots of the latter species and accounts for its presence in the reclamation <br />despite express intentions to exclude it. Similarly, smooth brume has sufficient similarity to <br />mountain brume that it may well end up mixed with that species in,commercially offered lots of <br />seed. <br />Sample Adequacy <br />A summary of sample adequacy calculations for the parameters of cover, herbaceous production, <br />and woody plant density is presented in Table 27 (Appendix 1). <br />Details of a two-stage sampling design and the formula used to sample woody plant density and <br />calculate variance in Wadge Pasture was detailed in the Methods section. The results of this <br />variance calculation are presented below: <br />1-(15/20) <br />VY = 41.5 + <br />15 <br />1-(3/607) <br />51.87 = 1.839 <br />3X15 <br />The result of the sample adequacy calculation determined using this variance (1.839) was that <br />with a sample size of fifteen (the number of primary units), the minimum sample size required <br />(using aone-tailed t-value with fourteen degrees of freedom: t= 1.345) was eight. <br />18 <br />