USDA Forest Service
 

Pacific Southwest Research Station


  fs.fed.us
 
Pacific Southwest
Research Station

800 Buchanan Street
Albany, CA 94710-0011
(510) 883-8830
United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.

Publications and Products

Research Note

Title: Tree shadow patterns and illumination measurements with clearcut strips and irregular openings in a true fir forest

Author: Gordon, Donald T.

Date: 1968

Source: Res. Note PSW-RN-172. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 9 p

Station ID: RN-PSW-172

Description: Daily progression of shadows cast by red and white fir trees in forest stand openings is illustrated by vertical aerial photographs made on the summer solstice at 2-hour intervals from 7 a.m. to 5 p.m. The aerial photos show shade patterns in three irregularly - shaped, natural stand openings and two different widths (3-chains and 5-chains) of clearcut strips. Illumination measurements are reported to aid interpretation of shadow patterns.

Keywords: Shading, protective, seedlings, seedling survival, natural regeneration, forest clearcutting, photorammetry, light, Abies concolor, Abies magnifica

View and Print this Publication (1.46 MB)

Citation

Gordon, Donald T.  1968.  Tree shadow patterns and illumination measurements with clearcut strips and irregular openings in a true fir forest.   Res. Note PSW-RN-172. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 9 p.

Last Modified: Nov 20, 2015 10:40:58 AM