Full text of this article is only available in PDF format.

Yrjö Vuokila

Harsintaperiaate kasvatushakkuissa

Vuokila Y. (1970). Harsintaperiaate kasvatushakkuissa. Acta Forestalia Fennica no. 110 article id 7544. https://doi.org/10.14214/aff.7544

English title: Selection from above in Intermediate cuttings.

Abstract

This study is concerned with silvicultural selection from above. The material consists of 18 Scots pine (Pinus sylvestris L.) sample plots in the southern half of Finland in experimental forests. The method is motivated by the great difference between the stumpage prices of saw timber and pulpwood. The method suggested includes the removal of individuals belonging to the predominating canopy, to achieve high levels of income from the stand at an early stage. The method is applied at when the growing stock is attaining saw-timber size. Before that the stand is treated with thinnings from below. It is supposed that the volume of growing stock is maintained at a level as high as that in below-thinned stands, and that rotation is of normal length.

On the average, the increment in basal area, as well as volume increment, is greater in stands selectively cut from above than in those treated with low thinnings of the same degree. Initially, selection from above seems to exert a negative effect upon the development of dominant height; later, the dominant height reassumes the same rate of increment as in the below-thinned stands. Selection from above also means an increase in saw-timber production, although it involves a reduction in the mean size of saw timber. The investigation includes growth and yield tables for pine stands treated with silvicultural selection from above.

The results of the investigation prove that silvicultural selection from above is at least as profitable as low thinning. This provides freedom for stand treatment, and contributes to the application of a method most suitable for the owner in each individual case. It is further stressed that the maintenance of a high wood capital in the stand is far more important than the method of thinning applied.

The PDF includes a summary in English.

Original keywords
yläharvennus; harvennushakkuut; hakkuumenetelmät; tukkipuu; tilavuuskasvu; tuottotaulukot; harsintahakkuu

English keywords
thinnings; thinning from above; cutting methods; saw-timber; volume growth; yield tables

Published in 1970

Available at https://doi.org/10.14214/aff.7544 | Download PDF

Creative Commons License

Register
Click this link to register for Silva Fennica submission and tracking system.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Your search results
Nyyssönen A., Vuokila Y. (1963) The effect of stratification on the number of sa.. Silva Fennica vol. 75 no. 2 article id 7136
Vuokila Y. (1970) Selection from above in Intermediate cuttings Silva Fennica vol. 0 no. 110 article id 7544