Abstract
Abstract Local merchantable board foot, cubic foot, and weight equations are developed for six economically important hardwood species in central Appalachia. Equations were based on a simple power function and were fit to volumes from the US Forest Service Forest Inventory Analysis data for West Virginia and parts of Ohio, Pennsylvania, Maryland, Virginia, and Kentucky. Five ecoregions were identified and the volume equations were tested to determine whether differences by ecoregion were statistically significant. Results varied by species, volume type, and ecoregion. Average bias between a single-species region-wide model and specific ecoregion forms ranged from −9.1 to 8.5% for gross board foot volume (International ¼ in.), −3.5 to 9.2% for gross merchantable cubic foot volume, and −9.5 to 16.7% for merchantable drybole weight (pounds).
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