Veneer recovery from Black Hills ponderosa pine /

Veneer recovered from a selected sample of 144 Black Hills ponderosa pine sawtimber trees was sufficient in both volume and grades to allow production of at least 3/8-inch C-D.plywood.Proportions of C and better grades of veneer increased with veneer block diameter but decreased with tree d.b.h. and block heights in the tree.This apparently conflicting trend results from the greater number of large knots in the middle-stem blocks of larger trees.Recovery ratios increased with both tree diameter and block diameter and were higher for defective blocks than sound blocks, due to the smaller net scale for defective blocks.Nearly 45 percent of the cubic-foot volume was utilized as veneer.