Effects of Tree Spacing and Height Reduction on Cone Production in Two Douglas-Fir Seed Orchards

Authors: Copes, D. L.; Bordelon, Mike

Source: Western Journal of Applied Forestry, Volume 9, Number 1, 1 January 1994 , pp. 5-7(3)

Publisher: Society of American Foresters

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Abstract:

Two treatments involving tree spacings (12 and 24 ft) within rows spaced 24 ft apart and height control (topped or not topped at 20 ft) were evaluated in 17- and 22-yr-old coast Douglas-fir (Pseudotsuga menziesii var. menziesii) seed orchards. Treatment differences for cone production were not significant because of the large tree-to-tree variation in cone production and, at one orchard, the confounding of location with treatment. Cone production in 1990 averaged slightly more than 2 bushels per tree (range 0 to 11.7 bushels). Average production per 96 linear ft of orchard row was 14.8 bushels. West. J. Appl. For. 9(1):5-7.

Document Type: Journal Article

Affiliations: State of Oregon, Department of Forestry, Salem, OR 97310

Publication date: January 1, 1994

More about this publication?
  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Western Journal of Applied Forestry covers the western United States, including Alaska, and western Canada; WJAF will also consider manuscripts reporting research in northern Mexico that has potential application in the southwestern United States.
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