REV96883

• Permit No: C1980007
• IBM Index Class Name: Revision
• Doc Name: APPENDIX 3 MINE RECLAMATION STUDY SECOND ANNUAL REPORT
• Type & Sequence: TR53
• Media Type: D
• Archive: No

density and production observed between aspects, and minor differences
• in these parameters among mulch treatments within aspects. The effects
of slope, aspect, angle, and mulches on plant growth are variable in the
4:1 treatments. There is a differential effect of mulches oa different
aspects and slopes: mulches show little beneficial effect on south
aspects, regardless of slope angle; mulches showed beneficial effects on
4:1 north aspects.
Table 3.4-5 is as expansion of Table 3.4-4. Table 3.4-5 presents
mixture differences on different aspects, slopes, and mulch treatments.
The following summary abstracts the statistically important results for
discussion. This summary identifies the mixture and mulch treatment
producing the best results within a particular aspect and slope angle
combination. The same summary for 1978 data was presented in the First
Annual Report (ERT 1979). The 1979 summary is intended to document the
changes is optimum treatments observed during the second growing season
and the reasons for these changes.
2:1 Slope 4:1 Slope
North South North South
Greatest Density
Xeric- Xeric- Xeric- Xeric-
Exeelsior Hydromulch, Straw Straw
Control Excelsior
Greatest Production
Xeric- Xeric- Xeric- Xeric-
Hydromulch Hydromulch Straw Straw
Excelsioz Excelsior
Control
The xeric mixture showed the maximum values for both density and
production on all slope angles and aspects. The mesic mixture provided
the greatest density during 1978 but suffered severe seedling mortality
during the 1978 summer. Qa 2:1 slopes, the application of mulches,
especially hydromulch, resulted in the highest values for density and
production. Oa 4:1 slopes, application of drill-straw treatment
resulted in the highest values for density and production. The bene-
ficial results from drill-straw method are more likely a consequence of
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