Effects of plantation and juvenile spacing on tree and stand development.Author(s): J. Harry G. Smith; Donald L. Reukema
Source: In: Oliver, Chadwick Dearing; Hanley, Donald P.; Johnson, Jay A., eds. Douglas-fir: stand management for the future: Proceedings of a symposium; 1985 June 18-20; Seattle, WA. Contribution no. 55. Seattle: College of Forest Resources, University of Washington. 239-245.
Publication Series: Scientific Journal (JRNL)
PDF: Download Publication (540 KB)
DescriptionThe aim of this paper is to summarize current knowledge of effects of initial spacing and respacing of plantations and natural stands on early growth until the time of first commercial entryfor coastal Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco), concentrating on conclusions that can be drawn from the literature and the authors' own studies.
General results of initially close spacings, with or without subsequent thinning, are well known (Evert 1971, 1973, 1984, Hamilton and Christie 1974, Sjolte Jorgensen 1967), and interest in spacing is increasing. The high costs of stand establishment, limited markets for small trees, ability of technologists to make good use of fast-grown wood, inability to grow clear Douglas-fir except by pruning, and the premiums for large logs and trees have strengthened the view that wider spacings are economically preferable (Smith 1958, 1980, Smith and Kennedy 1983).
To manage stands so that landowner's goals are achieved efficiently, forest managers must set target tree sizes for the products likely to be desired in the future. These tree sizes can be translated into desired numbers of trees per acre (or per ha), and thus into spacing. Fortunately, there can be flexibility in a manager's efforts to control stand development by numbers of trees, basal area, or average dbh. Targets established should allow efficient use of the resources available.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- 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.
CitationSmith, J. Harry G.; Reukema, Donald L. 1986. Effects of plantation and juvenile spacing on tree and stand development. In: Oliver, Chadwick Dearing; Hanley, Donald P.; Johnson, Jay A., eds. Douglas-fir: stand management for the future: Proceedings of a symposium; 1985 June 18-20; Seattle, WA. Contribution no. 55. Seattle: College of Forest Resources, University of Washington. 239-245.
- WestProPlus: a stochastic spreadsheet program for the management of all-aged Douglas-fir–hemlock forests in the Pacific Northwest.
- WestPro: a computer program for simulating uneven-aged Douglas-fir stand growth and yield in the Pacific Northwest.
- Historical forest structure, composition, and spatial pattern in dry conifer forests of the western Blue Mountains, Oregon
XML: View XML