Laserfiche WebLink
99 <br />• <br />Effect of Seed Plixture on the Cover of Grasses, Forbs, and Shrubs <br />Variation in cover values is so great among the subplots that few <br />significant differences or interactions were observed in response to the <br />seed mixtures (Appendix A, Tables 11 and 12). Seed mixture caused a <br />significant interaction or difference in only three areas in the cover of <br />grasses, forbs, and shrubs. <br />Total Cover of Grasses. A significant interaction was observed <br /> <br />between seed mixture and panel with respect to the cover of invading <br />grass species (Figure 36). On Panel 3 the cover of invading grass <br />species was significantly higher in the native seed mixture than in the <br />other two seed mixtures. This sharp increase in cover values of invading <br />grasses on Panel 3 with the native seed mixture is the same response <br />noted earlier for biomass of invading grass species. <br />Total Cover of Shrubs. Total cover of shrubs, both seeded and <br />invading species, showed significant (P=.0047) differences in cover by <br />seed mixtures. Subplots seeded with combination or native seed mixtures >>- f'`'~ <br />1 <br />rr-j" <br />had significantly higher shrub cover values than those seeded with the <br />introduced seed mixture. The cover of seeded shrub species was greater <br />in plots where the native seed mixture was seeded than where the intro- <br />duced seed mixture was seeded (Appendix A, Table 12). These results <br />r >;~ <br />correlate closely with those obtained for the biomass. of shrub species. <br />eo^ <br />Effect of Fertilization on the Oensity of Grasses, Forbs, and Shrubs <br />There are no significant interactions or differences when <br />considering the density of grasses, forbs, and shrubs for the three <br />fertilization treatments. The subplots showed too much variability in <br />u <br />