Authors: Walstad, J. D.; Brodie, J. D.; McGinley, B. C.; Roberts, C. A.

Source: Western Journal of Applied Forestry, Volume 1, Number 3, 1 July 1986 , pp. 69-73(5)

Publisher: Society of American Foresters

Abstract:

Retrospective analyses of three conifer sites in western Oregon and Washington were conducted to determine the long-term silvicultural impact and economic value of chemical brush control treatments performed 10 to 25 years earher. Comparisons between areas treated with phenoxy herbicides and untreated areas of the sites revealed significant differences in stocking and growth of Douglas-fir (Pseudotsuga menziesii). On two sites, invading red alder (Alnus rubra) virtually excluded conifers in the absence of brush control. On the untreated area of the third site, dense growth of varnishleaf ceanothus (Ceanothus velutinus var. laevigatus) reduced Douglas-fir stocking and diameter growth. On all three sites, projections of mature yield and economic returns based on current stand conditions indicated substantial benefits for areas where brush control treatments were applied. West. J. Appl. For. 1:69-73, July 1986.

Document Type: Journal article

Affiliations: 1: Corvallis, OR

Publication date: 1986-07-01

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