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Pacific Southwest Research Station
800 Buchanan Street
Albany, CA 94710-0011
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Title: Damage from wind and other causes in mixed white fir-red fir stands adjacent to clearcuttings
Author: Gordon, Donald T.
Source: PSW-RP-90. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station; 22 p
Station ID: RP-PSW-090
Description: Damage to timber surrounding clearcuttings and in one light selection cutting in mixed white fir-red fir stands was monitored for 6 years in northeastern California. In some years, bark beetles apparently killed more trees than did wind damage, but in two of the study years, severe wind storms caused much damage. One storm produced mainly breakage, apparently influenced by snow load. The other, a hurricane, produced mainly wind-throw. Relation of damage to tree size, crown class. and relative location reveals some trends. Study of height of breaks suggests that a mechanical stress point is influenced by tree size and crown class and other factors. Snow was the third most prevalent cause of damage, but applied only to smaller trees. Sonic indications for management of fir stands can he found in study results.
Key Words: Abies magnifica, Abies concolor, wind damage, wind stability, clear-cutting, snow damage, insect damage
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Gordon, Donald T. 1973. Damage from wind and other causes in mixed white fir-red fir stands adjacent to clearcuttings PSW-RP-90. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station; 22 p.
|Last Modified: Nov 20, 2015 10:44:43 AM|