Observations on the eccentricity of pine trunks in Lapland

Renvall, August

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

August Renvall

Observations on the eccentricity of pine trunks in Lapland

Renvall A. (1923). Observations on the eccentricity of pine trunks in Lapland. Acta Forestalia Fennica vol. 26 no. 4 article id 7092. https://doi.org/10.14214/aff.7092

Abstract

The hard climate and other environmental conditions cause irregularities in the growth of trees in Lapland. Those changes weaken the characteristics of the tree for industrial use and hence lowers the timber price. The eccentricity is mainly caused by the strong wind burden.

The data for the article consists of 428 increment core samples from pine trees different ages, sizes and growth rate. There were collected in years 1910-1912 in Finnish Lapland, regions Utsjoki and Inari. The increment cores were collected on the height of 1.3 meters in south-north direction straight crosswise through the whole tree. The difference of length was measured between southern and northern half rays. Earlier studies show that the eccentricity remains the same in different heights of the tree. Hence studying the variations only on the breast height radiuses is possible.

The mean eccentricity is 12.3% and its maximum varies mostly between 20 and 25%. There are no differences in eccentricity between trees of different age classes or diameter.

Keywords
pine; diameter; timber quality; Lapland; eccentricity

Published in 1923

Available at https://doi.org/10.14214/aff.7092 | Download PDF

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