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B802: Base-Age Invariant Polymorphic Site Index Curves For Even-Aged Spruce-Fir Stands In Maine, Bret P. Vicary, Thomas B. Brann, Raph H. Griffin

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The spruce-fir forest cover type, occupying nearly 8 million acres in Maine, accounts for approximately 50 percent of the growing stock volume in the State. A similar portion of Maine's commercial forest land is owned and managed by forest industry, with spruce and fir being the mainstay of the industry.

Analyses in recent years of Maine's timber supply have shown softwood removals to exceed growth. The dramatic effects of the spruce budworm (Choristoneura.fumiferana (Clemens)) on the spruce-fir forest of Maine has heightened concern over the timber supply. A greater emphasis on management is necessary if timber growth is to keep …