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Acta Forestalia Fennica
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Acta Forestalia Fennica vol. 39 | 1933

Category: Article

article id 7277, category Article
Einari Wuoti. (1933). Kuusipaperipuun kutistumisesta ja kutistumisen osuudesta pinon painumiseen. Acta Forestalia Fennica vol. 39 no. 6 article id 7277. https://doi.org/10.14214/aff.7277
English title: Studies on shrinkage of Norway spruce pulpwood and its effect on sinking of the stacks.
Original keywords: pino: pinomitta; puukauppa; kuitupuu

When the volume of the pulpwood was determined from the dimensions of the stack, the practice was to add an agreed percentage to the height of the stack which took account of the sinking of the stack as the wood dried. The stack was piled to the agreed added height, or the percentage was compensated when the stack was delivered to the buyer. The aim of the study was to determine a more accurate percentage to be used in the pulpwood sales.

The dimensions of a stack of Norway spruce (Picea abies (L.) H. Karst) pulpwood and the diameter of each log was measured during the drying. The 223 cm high pile sank by 0.8% to 221 cm, and the stacked cubic meter decreased from 4.46 m3 to 4.42 m3. However, the shrinkage of a solid cubic meter of the wood was 2.8%, markedly more than the sinking of the stack.

The PDF includes a summary in German.

  • Wuoti, ORCID ID:E-mail:
article id 7276, category Article
Paul Walldén. (1933). Eräs puun laadun tunnus. Acta Forestalia Fennica vol. 39 no. 5 article id 7276. https://doi.org/10.14214/aff.7276
English title: Bending strength of birch wood.

According to earlier studies, the weight of the wood may be a useful quality when aim is to create such wooden structures where small weight is combined with maximum mechanical strength. Of the northern tree species, Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) H. Karst.) and birch (Betula sp.), birch has the highest bending strength. The main focus of this study was to find out if there is correlation between the specific gravity of cell wall substance and bending strength of the birch wood, and if the specific gravity of cell wall substance could be used as indication of the quality of the wood.

Dominant trees from 55 years old birch (Betula sp.) stand was selected for bending tests. The bending strength did not vary in birch as much as in many other tree species. The highest bending strength was achieved near the specific gravity class s=0,65, and it can be concluded that when the specific gravity falls below S=0,57, the wood’s technical quality is not sufficient. The article includes a literature review on the subject.

The PDF includes a summary in German
  • Walldén, ORCID ID:E-mail:
article id 7275, category Article
Esa Hyyppä. (1933). Das Klima und die Wälder der spätglazialen Zeit im Bereich der karelischen Landenge. Acta Forestalia Fennica vol. 39 no. 4 article id 7275. https://doi.org/10.14214/aff.7275
  • Hyyppä, ORCID ID:E-mail:
article id 7274, category Article
Ilmari Paasio. (1933). Über die Vegetation der Hochmoore Finnlands. Acta Forestalia Fennica vol. 39 no. 3 article id 7274. https://doi.org/10.14214/aff.7274
  • Paasio, ORCID ID:E-mail:
article id 7273, category Article
T. J. Hintikka. (1933). Muutamia havaintoja männyn tuulenpesistä. Acta Forestalia Fennica vol. 39 no. 2 article id 7273. https://doi.org/10.14214/aff.7273
English title: Observations on witches' brooms in Scots pine.
English keywords: witches' broom; mutation

Witches' brooms of Scots pine (Pinus sylvestris L.) have been suggested to be genetic rather than caused by bacteria. Seeds were collected from cones growing in Scots pine witches' brooms. More than half (43) of the 84 seedlings grown from the seeds were stunted and resembled witches' broom. The growth of the normal and witches' broom like seedlings were compared. When the seedlings were 8 years old, the normal seedlings were in average 37 cm and the witches' broom like seedlings 8 cm high. The result supports the theory that the witches' broom like growth was inherited in the Scots pine seedlings.

The PDF includes a summary in German.

  • Hintikka, ORCID ID:E-mail:
article id 7272, category Article
Viljo O. Sierla. (1933). Uittoyhdistysten kuljettamat puumäärät vv. 1922-1927. Acta Forestalia Fennica vol. 39 no. 1 article id 7272. https://doi.org/10.14214/aff.7272
English title: Timber transportation of the floating associations in 1922¬‒1927.

 The numerous waterways have promoted the development of forest industry in Finland by offering an easy way to transport timber almost in the whole country. Floating associations arrange the floating for its members. This study, accomplished in the Forest Research Institute, compiles the statistics of the different associations in 1922­‒1927.  The volume of timber transported by the floating associations increased by 40% during the 6-year period, reaching 10.5 million m3 in 1927. The increase has been supported by the number of collectively used floating channels. The number of the floating associations increase from 17 to 26 and the length of the floating channels used by them to 8,300 km in 1922‒1927. About 70‒80% of the transported timber was logs and the 20‒30% small timber. Floated timber comprised 70-80% of the all roundwood used in the forest industry in Finland at the time. Majority of the logs were softwood.

The PDF includes a summary in German.

  • Sierla, ORCID ID:E-mail:

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