Volume 5
Issue 2
Forestry
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Available Online: http://www.ejpau.media.pl/volume5/issue2/forestry/abs-03.html
A TAPER MODEL FOR NORWAY SPRUCE (PICEA ABIES (L.) KARST.)
Jarosław Socha
ABSTRACT
A method of estimation of the stem form and volume of forest trees is developed. It is based on multiple regression equations used to determine the stem diameter at any relative height. Four variants of equations are developed. In the simplest one the diameter at breast height and tree height are the explanatory variables, while in the remaining equations the number of required variables increases. This method permits to estimate the volume of stems, as well as the volume of their portions, and it is free of systematic errors. The models developed in this study may be used in forest inventory, quality assessment of standing trees, and stand pricing.
Key words: stem form, taper model.