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Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Silva Fennica 1926-1997 vol. 16 no. 3 | 1982

Category: Article

article id 5164, category Article
Juhani Kangas, Tapio Klen. (1982). Raivaussahan kantokäsittelylaitteen käyttäjän altistuminen torjunta-aineille. Silva Fennica vol. 16 no. 3 article id 5164. https://doi.org/10.14214/sf.a15079
English title: Exposure of forest workers to herbicides.

The purpose of this study was to measure workers’ exposure to MCPA and glyphosate when sprayers connected to the brush saws was used. A non-pressurized sprayer with a pump and a pressurized sprayer where dosage was regulated with manual control were studied. Exposure was measured from the breathing zone and urine samples.

MCPA collected from the breathing zone gathered into alcohol was 0.05 mg/m3 for the pressurized sprayer, 0.02 mg/m3 for the non-pressurized sprayer, and 0.04 mg/m3 (average) for both types of sprayers together.

MCPA in the breathing zone, collected from splashes and fog into a glass fibre filter, was 0.18 mg/m3 for the pressurized sprayer, 0.09 mg/m3 for the non-pressurized sprayer, and 0.12 mg/m3 for both sprayers used together. Glyphosate in the breathing zone, collected into sodium hydroxide was below 0.05 mg/m3.

In five urine samples taken after the work day there was on the average 0.4 mg/l MCPA, while in 21 samples the MCPA contents were under the definition limit (0.2 mg/l).

The PDF includes a summary in Finnish.

  • Kangas, ORCID ID:E-mail:
  • Klen, ORCID ID:E-mail:
article id 5163, category Article
Leo Heikurainen. (1982). Ojitusalueiden taimistojen kehityksestä vuosina 1964-68 toimeenpannun suometsäkilpailun koealojen valossa. Silva Fennica vol. 16 no. 3 article id 5163. https://doi.org/10.14214/sf.a15078
English title: Development of seedling stands on drained peatlands in Southern Finland.

The aim of the paper was to describe the development of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) H. Karst.) seedling stands on drained peatlands and to find out the principal factors influencing their growth. The material under survey consists of 180 sample plots distributed from southern coast of Finland to the Polar Circle.

The most important growth factors have been the accumulated temperature sum, site quality, drainage intensity and silvicultural condition, such as the density of the stand, the proportion of birch in the stand, and the amount of possible shelterwoods. The influence of these factors, and to some extent the influence of fertilizing, and the disturbing effects of some forest damages, such as frost, growth disturbances and elk damages were investigated. Comparisons of the development in the seedling stands on drained peatlands with the known development of seedling stands in mineral soils were made.

The PDF includes a summary in English.

  • Heikurainen, ORCID ID:E-mail:
article id 5162, category Article
Jarmo Eronen. (1982). Neuvostoliiton massa- ja paperiteollisuuden alueellista laajenemista selittävät tekijät. Silva Fennica vol. 16 no. 3 article id 5162. https://doi.org/10.14214/sf.a15077
English title: Soviet pulp and paper industry.

Planners of the Soviet pulp and paper industry are constantly faced with the problem: which investment policy guarantees the best location structure? Should one invest in existing localities or expand to new areas, especially in heavily forested parts of Siberia? A location theory for the pulp and paper industry, based on three factors (markets, wood raw materials, relative costs) has been suggested by the Soviet authors Antonov and Trusova. In the present study the theory is – for the first time – given empirical contents and the feasible areas for future growth of the industry are tentatively determined. One of the main findings of the study is the detecting of considerable unutilized wood reserves in the European USSR. This supports those Soviet views advocating a European-oriented location in investment strategy for the industry, as market and cost factors are unfavourable to Siberian location.

The PDF includes a summary in Finnish.

  • Eronen, ORCID ID:E-mail:
article id 5161, category Article
Juhani Päivänen. (1982). Turvenäytteiden fysikaalisten ominaisuuksien suhde kutistumiseen kuivattaessa. Silva Fennica vol. 16 no. 3 article id 5161. https://doi.org/10.14214/sf.a15076
English title: Physical properties of peat samples in relation to shrinkage upon drying.

The study discusses the amount of shrinkage of volumetric undisturbed peat samples when drying to an oven-dry (105°C) condition. The amount of shrinkage is related to various physical properties of peat. In addition, some observations were performed on the shrinkage phenomenon during the drying process. The study results may be used when predicting the shrinkage of peat samples with various peat properties. Knowledge of this kind is particularly important in connection with peat harvesting.

The PDF includes a summary in Finnish.

  • Päivänen, ORCID ID:E-mail:

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