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<br />The sample adequacy formula used for this data set is explained fully in <br />Table K-17, page k-49 of the 16 June 1980 submission. <br />The sample adequacy formula used for this data set is explained fully in <br />Table K-17, page k-49 of the 16 June 1980 submission. <br />We have presented two commonly used diversity indices (including the <br />Shannon-Weiner) for each vegetation type in the June 1980 submission. <br />We think this presentation addresses any existing or proposed guidelines <br />• <br />concerning diversity indices. Furthermore, the weighted P, suggested is <br />t <br />not a realistic figure. As suggested, <br />affected plant community acres <br />Pi = Pi in which species A occurs <br />total affected acres <br />The proposed weighted Pi seems not to take into account the fact that <br />there is in many cases a Pi for a species in several vegetation types. If <br />it was really desirable to calculate an affected azea weighted Pi, a slight <br />modification of the formula could be used to calculate the value. <br />However, we question the use of this value and, especially, the <br />"Importance Value' derived from the weighted Pi, until the specific use <br />of these abstract numbers in determination of reclamation success is <br />specified. Importance values and related synthesized numbers will <br />require intensive review as to their practical applicability as input to <br />reclamation success evaluation. <br />K-~17a <br />