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Publication Information

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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

Publication Series: Research Note (RN)

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

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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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

 


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