Estimation of Stand Value-Increment and Inherent Variables

Wien

1974

9 Lit. Ang.

Unselbständiges Werk

673

200144706

For the achievement of improved bases for decision-making in regard to regeneration and other cuts, methods have been studied for estimation of the value increment of stands formed by Scots pine and Norway spruce. Since in general information is required in regard to volume increment, stand volume and value simultaneously, the assessment of these factors has also been discussed. The main aim has been that of developing procedures for rapid estimation of these characteristics, but methods utilizing stand tables have also been subjected to scrutiny. The present paper provides examples of regression functions developed for the purpose from rather extensive material in the southern half of Finland. For key tasks, functions with a comparatively high degree of determination could be found. Estimations of the stand volume and value require only measurement of the basal area, mean diameter and mean height, and information on average timber prices. For the estimation of value increment, the volume increment percentage is determined first. The application of price coefficients then leads to the value increment. Practical application of the results can be facilitated by the preparation of tables and graphs. Further tests will indicate the mutual importance of different approaches.