%0 Article
%T Competition indices and the prediction of radial growth in Scots pine.
%A Pukkala, Timo
%A Kolström, Taneli
%D 1987
%J Silva Fennica
%V 21
%N 1
%R doi:10.14214/sf.a15463
%U https://silvafennica.fi/article/5306
%X <p>The effect of competition on the radial growth of Scots pine (<em>Pinus sylvestris</em> L.) was studied in three naturally regenerated stands located in North Karelia, Finland. The competition situation of an individual tree was described with various competition indices which depended on the sizes and distances from the neighbouring trees. One competition index explained about 50% of the variation in 5-year radial growth in one stand. If all stands were combined, one index explained 43.5%, two indices 48.9% and three indices 51.2% of the variation. In one stand, the best competition indices accounted for about 20% of that variation which could not be explained by tree diameter. If all three stands were combined, the best index explained 11% of the residual variation. About 40% of the variation in 5-year radial growth could not be explained by the diameter and competition indices. <br>The PDF includes an abstract in Finnish.</p>