Current issue: 54(2)

Impact factor 1.683
5-year impact factor 1.950
Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles containing the keyword 'Douglas-fir'.

Category: Research article

article id 435, category Research article
Rebecca Ralston, Joseph Buongiorno, Jeremy S. Fried. (2004). Potential yield, return, and tree diversity of managed, uneven-aged Douglas-fir stands. Silva Fennica vol. 38 no. 1 article id 435. https://doi.org/10.14214/sf.435
The effects of different management regimes on uneven-aged Douglas-fir stands in the Pacific Northwest of the United States were predicted with a simulation model. Management alternatives were defined by residual stand structure and cutting cycle. The residual stand structure was set by basal area–diameter-q-ratio (BDq) distributions, diameter-limit cuts (assuming concurrent stand improvement), or the current diameter distribution. Cutting cycles of 10 or 20 years were applied for 200 years. The current diameter distribution was defined as the average of the uneven-aged Douglas-fir stands sampled in the most recent Forest Inventory and Analysis conducted in Oregon and Washington. Simulation results were compared in terms of financial returns, timber productivity, species group diversity (hardwoods vs softwoods), size class diversity, and stand structure. Other things being equal, there was little difference between 10- and 20-year cutting cycles. The highest financial returns were obtained with either a 58.4 cm diameter-limit cut, or a BDq distribution with 8.4 m2 of residual basal area, a 71.1 cm maximum diameter, and a q-ratio of 1.2. Using the current stand state as the residual distribution was the best way to obtain high tree size diversity, and high species group diversity. Several uneven-aged regimes gave net present values comparable to that obtained by converting the initial, uneven-aged stand to an even-aged, commercially thinned, plantation.
  • Ralston, Dept of Forest Ecology and Management, University of Wisconsin, Madison, WI 53706, USA ORCID ID:E-mail:
  • Buongiorno, Dept of Forest Ecology and Management, University of Wisconsin, Madison, WI 53706, USA ORCID ID:E-mail: jbuongio@facstaff.wisc.edu (email)
  • Fried, USDA Forest Service, Pacific Northwest Forest Experiment Station, Forest Inventory and Analysis Program, P.O. Box 3890, Portland, OR 97208, USA ORCID ID:E-mail:

Category: Article

article id 7252, category Article
Yrjö Ilvessalo. (1929). Notes on some forest (site) types in North America. Acta Forestalia Fennica vol. 34 no. 39 article id 7252. https://doi.org/10.14214/aff.7252

The article includes observations on forest site types in Canada and the United States, with special emphasis on forests of lodgepole pine (Pinus murrayana, now Pinus contorta Douglas ex Loudon) which the author considers a species that can become a favourite exotic tree species in Finland. Some notes are made also about Jack pine (Pinus banksiana Lamb.) and Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests. The author was not able to make a systematic forest type investigation, because the journey was made on another purpose. The article describes the vegetation and climate of the visited areas, and divides the forest site types in three groups: Dry forest site types, moist forest site types and grass-herb site types. The vegetation and plant species on several subtypes are described in detail.

The volume 34 of Acta Forestalia Fennica is a jubileum publication of professor Aimo Kaarlo Cajander.

  • Ilvessalo, ORCID ID:E-mail:

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