. An analysis of Pennsylvania's forest resources. Forests and forestry Pennsylvania; Forest management Pennsylvania. Old-growth hemlock stands are rare in Penn's Woods today (Tionesta Scenic Area, McKean County).. areas with more frost-free days. The cutting practices and fires earlier in this century did not favor the reestab- lishment of softwood stands (especially white pine and hemlock), and lowland conditions that would support elm/ash/red maple or oak/gum stands are uncommon. The most abundant type group is oak/hickory. This group accounts for the majority of the commercial forest acreag
. An analysis of Pennsylvania's forest resources. Forests and forestry Pennsylvania; Forest management Pennsylvania. Old-growth hemlock stands are rare in Penn's Woods today (Tionesta Scenic Area, McKean County).. areas with more frost-free days. The cutting practices and fires earlier in this century did not favor the reestab- lishment of softwood stands (especially white pine and hemlock), and lowland conditions that would support elm/ash/red maple or oak/gum stands are uncommon. The most abundant type group is oak/hickory. This group accounts for the majority of the commercial forest acreage in the North-Central (54 per- cent) and the Southwestern (58 per- cent) Units, and dominates the South-Central, Pocono, and South- eastern Units (72 percent). The nine oak/hickory types account for mil- lion acres of commercial forest land. Within this type group, the most common type is chestnut oak with million acres. Sawtimber stands dominate the group with 53 percent while poletimber stands are next with 30 percent, followed by other stands with 17 percent. Besides the white pine and hemlock type group, oak/hickory has the highest percent- age of sawtimber stands, an indica- tion that this is one of the more ma- ture forest-type groups in the state. The other major forest-type group, northern hardwoods, ac- counts million acres and domi- nates the forests of the Allegheny (69 percent), Northeastern (64 percent), and Western (44 percent) Units. The sugar maple/beech/yellow birch for- est type is most prevalent with million acres. The black cherry type accounts for million acres and, from a timber perspective, is the most valuable type in Pennsylvania. The stand-size distribution of the northern hardwoods type group is similar to the statewide average, with 46 percent in sawtimber stands. Two ownership classes, National Forest and forest industry, are dominated (70 and 55 percent, respectively) by northern hardwoods. This is ex- pected since all of th
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