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

Lauri Ilvessalo

Puuluokitus ja harvennusasteikko

Ilvessalo L. (1929). Puuluokitus ja harvennusasteikko. Acta Forestalia Fennica vol. 34 no. 38 article id 7251. https://doi.org/10.14214/aff.7251

English title: Utilization of tree classification in thinnings.

Abstract

Doctor Lauri Ilvessalo modified tree classification developed by professor Gunnar Schotte to develop a tree classification and thinning system that suited Finnish conditions. His system was first applied when the Finnish Forest Research Institute began thinning experiments in a large scale in 1924. The system distinguishes four crown storeys: the predominating crown storey, dominated crown storey, emergent trees and undergrowth. Into the predominating storeys belong dominant trees and co-dominant trees, and into the dominated storeys the intermediate and ground trees. The trees in all the storeys can be divided in to normal trees with well-formed crown and stem, trees with defectively developed crown, trees with defective stem, and injured and diseased trees. The article describes different thinning methods (cleaning thinning, selective thinning from below, selective thinning from above, increment felling, freeing felling) using the tree-classification.

The volume 34 of Acta Forestalia Fennica is a jubileum publication of professor Aimo Kaarlo Cajander. The PDF includes a summary in English.

Original keywords
latvuskerros; harvennushakkuu; harvennustapa

English keywords
crown class; thinning method

Published in 1929

Available at https://doi.org/10.14214/aff.7251 | 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
Ilvessalo L. (1929) Utilization of tree classification in thinnings Silva Fennica vol. 34 no. 38 article id 7251
Ilvessalo L. (1926) Forest research work in Finland : the origins an.. Silva Fennica vol. 31 no. 2 article id 7201
Ilvessalo L. (1926) Forest research in Finland: the origins and deve.. Silva Fennica vol. 31 no. 1 article id 7200
Ilvessalo L. (1920) Prospects of cultivating exotic tree species in .. Silva Fennica vol. 17 no. 2 article id 7050
Ilvessalo L. (1917) Studies on the regeneration years of Scots pine .. Silva Fennica vol. 6 no. 2 article id 7013
Ilvessalo L. (1913) Experiments with foreign tree species in state f.. Silva Fennica vol. 2 no. 2 article id 7529
Ilvessalo L. (1927) Proposal for the development of forest research .. Silva Fennica vol. no. 7 article id 4448
Ilvessalo L. (1927) Cultivation of exotic tree species Silva Fennica vol. no. 4 article id 4442
Ilvessalo L. (1926) Ensuring preservation of forests on the coast of.. Silva Fennica vol. no. 2 article id 4435