Benson, Robert E., and Michael J. Gonsior. 



1981. Tree damage from skyline logging in a western larch/ 

 Douglas-fir stand. USDA For. Serv. Res. Pap. INT-268, 15 p. 

 Intermt. For. and Range Exp. Stn., Ogden, Utah 84401. 



Damage to shelterwood leave trees and to understory trees in 

 shelterwood and clearcut logging units logged with skyline yarders 

 was measured, and related to stand conditions, harvesting specifica- 

 tions, and yarding system-terrain interactions. About 23 percent of 

 the marked leave trees in the shelterwood units were killed in 

 logging, and about 10 percent had moderate to serious damage. 

 About 40 percent of the understory trees were killed. Heaviest 

 damage in shelterwood was associated with steeper slopes, more 

 trees per acre, and cross-slope angle to the skyline. Understory 

 damage was greater on larger saplings than on seedlings. 



KEYWORDS: logging damage, skyline logging, scars, tree damage 



Benson, Robert E., and Michael J. Gonsior. 



1981. Tree damage from skyline logging in a western larch/ 

 Douglas-fir stand. USDA For. Serv. Res. Pap. INT-268, 15 p. 

 Intermt. For. and Range Exp. Stn., Ogden, Utah 84401. 



Damage to shelterwood leave trees and to understory trees in 

 shelterwood and clearcut logging units logged with skyline yarders 

 was measured, and related to stand conditions, harvesting specifica- 

 tions, and yarding system-terrain interactions. About 23 percent of 

 the marked leave trees in the shelterwood units were killed in 

 logging, and about 10 percent had moderate to serious damage. 

 About 40 percent of the understory trees were killed. Heaviest 

 damage in shelterwood was associated with steeper slopes, more 

 trees per acre, and cross-slope angle to the skyline. Understory 

 damage was greater on larger saplings than on seedlings. 



KEYWORDS: logging damage, skyline logging, scars, tree damage 



