. An analysis of Pennsylvania's forest resources. Forests and forestry Pennsylvania; Forest management Pennsylvania. Scotch and Virginia pine Aspen/Birch White pine/Hemlock Elm/Ash/Red maple r Oak/Pine Spruce/Fir Figure 13. —Percentage of commercial forest-land area, by major forest-type group, Pennsylvania, 1978 (the oak/gum group amounts to less than per- cent). Oak/Hickory Northern hardwoods 150 150 Figure 14.—The average number of days without a killing frost (Source: Cunningham et al. 1977). 21. Please note that these images are extracted fro

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. An analysis of Pennsylvania's forest resources. Forests and forestry Pennsylvania; Forest management Pennsylvania. Scotch and Virginia pine Aspen/Birch White pine/Hemlock Elm/Ash/Red maple r Oak/Pine Spruce/Fir Figure 13. —Percentage of commercial forest-land area, by major forest-type group, Pennsylvania, 1978 (the oak/gum group amounts to less than per- cent). Oak/Hickory Northern hardwoods 150 150 Figure 14.—The average number of days without a killing frost (Source: Cunningham et al. 1977). 21. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Powell, Douglas S; Considine, Thomas J. [Broomall, Pa. ] : United States Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station

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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, bookleafnumber31