Current issue: 58(1)

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Acta Forestalia Fennica
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Acta Forestalia Fennica vol. 48 | 1939

Category : Article

article id 7347, category Article
Aarno Kalela. (1939). On meadows and meadow alike vegetation communities on the Rybachy Peninsula in Petsamo, Lapland. Acta Forestalia Fennica vol. 48 no. 2 article id 7347. https://doi.org/10.14214/aff.7347
Keywords: peatland; plant community; vegetation unit; site classification; meadow
Abstract | View details | Full text in PDF | Author Info

The article presents the characteristics of different vegetation areas (meadows and peatlands) by their distinctive vegetation. The study area is by the Barents Sea and is the northernmost part of continental European Russia. Different sites are classified by plant communities and/or vegetation units.

The article continues on the second PDF-file. 

  • Kalela, E-mail: ak@mm.unknown (email)
article id 7346, category Article
Th. Wegelius. (1939). The presence and properties of knots in finnish spruce : investigations concerning the origin and characteristics of branch and knot wood in finnish spruce with particular consideration given to the raw material needs of the paper industry. Acta Forestalia Fennica vol. 48 no. 1 article id 7346. https://doi.org/10.14214/aff.7346
Keywords: Picea abies; pulpwood; quality of wood
Abstract | View details | Full text in PDF | Author Info

The most important characteristics for the quality of round timber is knottiness. Knots decrease the strength of the wood in sawn goods. Knots in pulpwood obstruct the production process of ground pulp and lower the quality. A qualitative classification of saw logs has been suggested, and the abundance of knots could also be used to determine the quality of pulpwood. In this study, visual observations on the preparation of pulpwood in pulp mill were made to observe the quality of the wood. Samples of the wood was collected, and they were divided in five quality classes. To study the influence of age, forest site type and stand on knots, 140 sample trees of Norway spruce (Picea abies (L.) H. Karst.) were analyzed. The article includes detailed analysis of the abundance and position of knots in the stems of spruce, anatomical structure of the knots, microscopic structure of the fibers, and mechanical properties of the branch and knot wood.

  • Wegelius, E-mail: tw@mm.unknown (email)

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