An assessment of the mineral resources potential of the San Isabel National Forest, south-central Colorado

10.3133/b1638 ◽  
1984 ◽  
Keyword(s):  
Mineral Resources ◽  
National Forest ◽  
South Central

Do Shade and Shrubs Enhance Natural Regeneration of Douglas-Fir in South-Central Idaho?

1995 ◽  
Vol 10 (1) ◽  
pp. 24-28 ◽  
Author(s):  
Michael Hunt Jones
Keyword(s):  
Natural Regeneration ◽  
Positive Association ◽  
Soil Surface ◽  
Douglas Fir ◽  
National Forest ◽  
Shrub Species ◽  
Preparation Methods ◽  
South Central ◽  
Early Seedling ◽  
Median Date

Abstract Shade duration and shrub composition in microsites with naturally regenerated Douglas-fir seedlings (Pseudotsuga menziesii var. glauca) were compared to randomly located control plots without seedlings in hot, dry group selection cuts in the southernmost Boise National Forest. Shade duration was estimated using a sighting device which allowed quantification of the degrees of the sun's arc intercepted by timber, shrubs, or other obstructions. Measurements were standardized for the median date for summer high temperatures. Seedlings received more whole-day (P<0.001) and afternoon (P<0.001) shade than control plots, and seedlings on southern exposures received more shade than those on other aspects. Seedling plots had more shrub cover than control plots (P<0.007). However, of nine shrub species examined, only buckbrush exhibited a significantly positive association with seedlings. Soil surface temperatures under buckbrush were reduced more than under other species, and unshaded surfaces remained above 50°C for extended time periods. These results suggest that natural regeneration of Douglas-fir may be enhanced by harvest practices and site preparation methods which provide shade during critical stages of germination and early seedling establishment. West. J. Appl. For. 10(1):24-28.

scholarly journals Potential mineral resources, Payette National Forest, Idaho: description and probabilistic estimation

1998 ◽  
Author(s):  
Arthur A. Bookstrom ◽  
Bruce R. Johnson ◽  
Theresa M. Cookro ◽  
Karen Lund ◽  
Kenneth C. Watts ◽  
...  
Keyword(s):  
Mineral Resources ◽  
National Forest ◽  
Probabilistic Estimation

scholarly journals Tectonostratigraphic controls on the Connaigre Peninsula of south-central Newfoundland and their implications for intrusion-related mineral resources

2015 ◽  
Author(s):  
N Rogers ◽  
D A Kellett ◽  
V J McNicoll ◽  
C van Staal ◽  
G Ruberti ◽  
...  
Keyword(s):  
Mineral Resources ◽  
South Central
Sign in / Sign up

Export Citation Format

Share Document