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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. 13 no. 4 | 1979

Category: Article

article id 5055, category Article
Eino Mälkönen. (1979). Uusi opas tutkimusraportin laatijoille. Silva Fennica vol. 13 no. 4 article id 5055. https://doi.org/10.14214/sf.a14912
English title: Book review: Tutkimusraportin laadinnan perusteita.
Keywords: book review

This article is a book review on the Finnish book ’Tutkimusraportin laadinnan perusteita’ by professor Matti Kärkkäinen. The book handles on priciples on writing a research report.

  • Mälkönen, ORCID ID:E-mail:
article id 5054, category Article
Pekka Kilkki. (1979). Outline for a data processing system in forest mensuration. Silva Fennica vol. 13 no. 4 article id 5054. https://doi.org/10.14214/sf.a14911

This paper presents the principles of a unified data processing system suitable for derivation of the most variables of interest in forest mensuration. The precedence (succedence) relations between the tree and forest stand variables are analysed and a block-wise simultaneous recursive multi-equation model is suggested to describe these relations. Regression analysis is used in the estimation of the model parameters and Taylor’s series and Monte Carlo simulation are available in the derivation of the unbiased results.

The PDF includes a summary in Finnish.

  • Kilkki, ORCID ID:E-mail:
article id 5053, category Article
Matti Häkkilä. (1979). Maatilatalouden tuloveroasetuksen muuttamisen vaikutus verokuutiometrin kunnittaisiin hintoihin. Silva Fennica vol. 13 no. 4 article id 5053. https://doi.org/10.14214/sf.a14910
English title: Effects of the revision of the forest taxation laws in local values for the taxable cubic metre.

The paper evaluates the effect of the change in the forest taxation laws which came into force in January 1977 on the value of the taxable cubic metre in each commune, a measure of the mean timber price. The taxable cubic metre is taken into include timber assortments corresponding to the mean planned cut for the area, which are then assessment at their mean local stumpage prices. Account is also taken of the mean costs involved in forestry, which increase from the south of Finland to the north.

The new principles of taxation, based on data from the V and VI National Forest Inventories, give higher values for the taxable cubic metre, and thus heavier taxation, in the Southern Finland, largely by allowing for a higher proportion of saw logs than previously, and lower values, an easing of taxation, in the north.

The PDF includes a summary in English.

  • Häkkilä, ORCID ID:E-mail:
article id 5052, category Article
Markku Nylund, Antti Haapanen, Seppo Kellomäki, Liisa Nylund. (1979). Deterioration of forest ground vegetation and decrease of radial growth of trees on camping sites. Silva Fennica vol. 13 no. 4 article id 5052. https://doi.org/10.14214/sf.a14909

The ground cover vegetation and tree growth at several camping sites in Southern Finland were investigated. The deterioration of ground vegetation appeared to be unavoidable in these areas, and only a few grass species were tolerant to heavy trampling. Only moderate deterioration was, however, detected when the trampling level was lower than 10,00015,000 user days. On the other hand, the ground cover was completely destroyed when the trampling level exceeded 100,000 user days. A considerable decrease in radial growth appeared to be associated with destruction of the ground vegetation. The decrease was abrupt and was found to continue throughout the whole period of use. After ten years’ use the growth in the trampled areas was 35% lower than that that of the untrampled areas. A further decrease in radial growth is expected in the future. 

The PDF includes a summary in Finnish. 

  • Nylund, ORCID ID:E-mail:
  • Haapanen, ORCID ID:E-mail:
  • Kellomäki, ORCID ID:E-mail:
  • Nylund, ORCID ID:E-mail:
article id 5051, category Article
Aili Tuimala. (1979). Kuusen lahon aiheuttamista puutavaralajisiirtymistä ja kantohintamenetyksistä. Silva Fennica vol. 13 no. 4 article id 5051. https://doi.org/10.14214/sf.a14908
English title: Changes in timber assortments and loss in stumpage prices caused by decay in growing Norway spruce timber.

Material for this study was collected from 26 stands marked for clear cutting in Southern Finland. The volume of decayed Norway spruce (Picea abies (L.) H. Karst.) timber and pulpwood was determined by deducting the volumes of these assortments (as recorded on the measurement certificate) from the volume of the standing trees. To obtain the economic loss, the volume of decayed wood was multiplied by the difference in stumpage prices between spruce timber of pulpwood and pine pulpwood. In the 17 stands of Buyer A the loss in timber volume caused by decay was 5.84% and the loss in stumpage price 2.84 Fmk/m3 (means weighted by volume). The corresponding figures in the 9 stands of Buyer B were 10.87% and 5.50 Fmk/m3, respectively.

At the mean stumpage price level for the felling season 1977-78 the losses in the stands m.f.c. mentioned above were 2.87% per unit price in the stands of Buyer A and 5.75% in the stands of Buyer B.

The PDF includes a summary in English.

  • Tuimala, ORCID ID:E-mail:
article id 5050, category Article
Aarne Nyyssönen. (1979). Suomen metsäntutkimuksen ulkomaiset yhteydet. Silva Fennica vol. 13 no. 4 article id 5050. https://doi.org/10.14214/sf.a14907
English title: International contacts of Finnish forest research.

The article describes various forms of international contacts in the Finnish forestry research and emphasizes the importance of this cooperation. The relatively small additional resources required to maintain contacts should be safeguarded. When considering the ways in which international contacts could be strengthened, coordination with the aims of the public and private sectors is needed.

The PDF includes a summary in English.

  • Nyyssönen, ORCID ID:E-mail:
article id 5049, category Article
Pirkko Ilonen, Pertti Hari, Markku Kanninen, Seppo Kellomäki. (1979). On distribution of growth in crown system of young Scots pine stands. Silva Fennica vol. 13 no. 4 article id 5049. https://doi.org/10.14214/sf.a14906

Branching and terminal growth of lateral shoots and needle growth of Scots pine (Pinus sylvestris L.) is investigated as a function of the whorl’s position and age and prevailing light climate. Number of buds per whorl was linearly and positively related to the whorl’s position and prevailing light climate. The growing whorl’s number counting from the apex was associated with declining bud number. The terminal growth of lateral shoots increased exponentially within the values 0.6–1.0 of the whorls position. Under these values the terminal growth was negligible. The growing whorl’s number indicated curvlinear decrease in shoot growth respectively, and only negligible growth occurred when the whorl’s age exceeded 10 years. The shoot growth was linearly related to the prevailing light climate but differences between dominating and dominated trees were apparent. The distribution of needle growth in the crown system was similar to that of shoot growth.

The PDF includes a summary in Finnish.

  • Ilonen, ORCID ID:E-mail:
  • Hari, ORCID ID:E-mail:
  • Kanninen, ORCID ID:E-mail:
  • Kellomäki, ORCID ID:E-mail:
article id 5048, category Article
Seppo Kellomäki. (1979). The effect of solar radiation and air temperature on basic density of Scots pine wood. Silva Fennica vol. 13 no. 4 article id 5048. https://doi.org/10.14214/sf.a14905

The effect of solar radiation and air temperature on the basic density of Scots pine (Pinus sylvestris L.) wood has been investigated on the basis of material obtained from the literature. Solar radiation seemed to affect basic density during earlywood formation. Temperature had the greatest effect on basic density  in late summer. The varying effects of radiation and temperature seemed to be associated with the dynamics of the crown system of trees. Especially the capacity of the crown system to produce the amount of photosynthesis needed in tracheid growth is assumed to be of importance in controlling the variation in the basic density of Scots pine wood. Growth of thracheids from the point of view of photosynthate supply is discussed.

The PDF includes a summary in Finnish.

  • Kellomäki, ORCID ID:E-mail:
article id 5047, category Article
Pekka Kilkki, Martti Varmola. (1979). A nonlinear simultaneous equation model to determine taper curve. Silva Fennica vol. 13 no. 4 article id 5047. https://doi.org/10.14214/sf.a14904

In the original set of equations derived by regression analysis, relative-height diameters (endogenous variables) are presented as nonlinear functions of the other relative-height diameters and of the height of the tree (an exogenous variable). Any of the original equations can be replaced by an interpolation formula which links a measured diameter to the four closest relative-height diameters. The solution of the simultaneous equation model yields 10 relative-height diameters. Intermediate values are obtained to avoid biases due to the nonlinearity of the simultaneous model equations.

The PDF includes a summary in Finnish.

  • Kilkki, ORCID ID:E-mail:
  • Varmola, ORCID ID:E-mail:

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