Author Description

Variation in wood properties, timber harvest and yield, on the establishment of seed-tree and shelter-tree stands as compared with clear-felling of Pillus sylcestris, was studied at two sites. Seed trees and shelter trees were selected on the basis of seed productivity, health and aualitv criteria. Pines not needed to establish seed or shelter tree stand are referred to as "indifferent pines". The annual radial increment of seed trees was suoerior to that of indifferent ~inesb, ut 2, basic density from pith to bark was lower. Shelter trees were intermediate. Differences in wood properties and dimensions between seed trees, shelter trees and indifferent pines reflect the selection criteria used. Differences in value were related to the timber section of the tree, the amounts of pulpwood being more or less constant.