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be incorporated into the topsoil. All individuals of snowbPSry could <br />be in~rporated into the topsoil. <br />Of the three shrub species encountered in the aspen subtype shrub <br />stratum, (chokecherry, Gambel oak and snowberry), only the latter species <br />could be incorporated into the topsoil without individual exception. <br />Many individuals of the former two species were larger than the maxiimmi <br />allv.~+ed for shrub incorporation as evidenced by average shrub height <br />and basal area estimates. All aspen trees except seedlings and sorry <br />saplings would not be taken with the topsoil. <br />TREE DENSITY AND BASAL AREA <br />Tree density and basal area estimates are provided for each of the 30 <br />transects surveyed in aspen stands (Appendix B, Part 2) . A surT<~ry is <br />presented in Table 5. Density estimates ranged from 87 to 1200 trees/ <br />acre in the stands surveyed with a mean density of 594.5 trees/acre <br />over all stands. Tree size averages on the transects ranged from a <br />diameter breast high (dbh) of 11.5 cml (basal area = 104.7 cm2) to <br />25.9 crn (basal area = 523.3 cm2). Size-class distributions for all <br />trees rreasured are represented graphically in Figure 4. The majority <br />of the trees measured (81~) were in the size range of 4.2 - 20.3 can <br />(dbh) with a mile of 12.3 to 16.3 cm (dbh). <br />~• <br />-29- <br />