. An analysis of Pennsylvania's forest resources. Forests and forestry Pennsylvania; Forest management Pennsylvania. about 15.5 inches. Young, small saw- timber trees may qualify in every way but diameter, so the maturing proc- ess is important. Currently, 51 per- cent of the hardwood sawtimber volume is in trees over 15 inches in dbh —an improvement over 1965 when only 45 percent was over 15 inches. Perhaps more important than this increase for all hardwoods is the increase in commercially valued species. Red oak currently has 61 percent of its sawtimber volume in trees over 15 inches, up fro
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. An analysis of Pennsylvania's forest resources. Forests and forestry Pennsylvania; Forest management Pennsylvania. about 15.5 inches. Young, small saw- timber trees may qualify in every way but diameter, so the maturing proc- ess is important. Currently, 51 per- cent of the hardwood sawtimber volume is in trees over 15 inches in dbh —an improvement over 1965 when only 45 percent was over 15 inches. Perhaps more important than this increase for all hardwoods is the increase in commercially valued species. Red oak currently has 61 percent of its sawtimber volume in trees over 15 inches, up fro