. Bulletin (Pennsylvania Department of Forests and Waters), no. 35. Forests and forestry. ' 4 \ -J*. â¢!, V , V*"-'^' -w" »m, . -"^B'C >⢠â 'V- . 'S '"'â ^ 'â /*"â â â¢â â â¢''?^'. t3 Q < OS Q i-i U H 03 u o: H Q U OS â < o Not only is the growth of trees injured by fire retarded, but the quality of the wood produced and the quantity finally harvested are also reduced. Though a tree may have sufficient vitality to cover a fire scar, nevertheless the defect is still there and, in the majority of cases, it grows with the size and age of the tree. When the
. Bulletin (Pennsylvania Department of Forests and Waters), no. 35. Forests and forestry. ' 4 \ -J*. â¢!, V , V*"-'^' -w" »m, . -"^B'C >⢠â 'V- . 'S '"'â ^ 'â /*"â â â¢â â â¢''?^'. t3 Q < OS Q i-i U H 03 u o: H Q U OS â < o Not only is the growth of trees injured by fire retarded, but the quality of the wood produced and the quantity finally harvested are also reduced. Though a tree may have sufficient vitality to cover a fire scar, nevertheless the defect is still there and, in the majority of cases, it grows with the size and age of the tree. When the injured tree is cut there is considerable loss due to heart rot, stam. and wind shake. This is particularly the case in sprout forests. Fire kills ijnnviug timber. As i)reviously noted, if a tree is girdled by the sc()rching of its cambium layer or of its root, it dies. Fire thus kills a varymg pro])ortion of the stand through which it burns, but especially the small growth, and the sensitiye species. Trees that are not killed immediately, die later as a direct result of the fire. Recently established plantations are, therefore, liable to destruction by fire and require extra precautions for protection. If trees cannot be protected they should not be planted. Damage to standing growth results in an immediate loss. 1. There is the loss of dead trees of merchantal)le size which, for various reasons, cannot be marketed while still sound, and which decrease in market value by reason of some delay before harvesting. 2. The loss of value occasioned by the marketing of material not yet grown to the size which would yield"the highest value. 3. The loss in final cut which nuist be exi)ected if injured trees are permitted to stand until thev reach what would otherwise be a mer- chantal)le age. 4. There should also be considered the fact that there may be and usually is some expense connected with the inconvenience of having to harvest before maturity or of harvesti
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