Annual inventory report for Pennsylvania's forests: results from the first two years.
Resour. Bull. NE-156. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 71 p.
In 2000, the USDA Forest Service's Forest Inventory and Analysis (FIA) program implemented a new system for inventory and monitoring Pennsylvania?s forest resources. The most salient benefit of the new inventory process will be a nearly threefold improvement in timeliness. This report summarizes the results of the first 2 years of annual inventory measurements. The area of forest land in Pennsylvania has remained stable since a previous inventory in 1989. The Keystone State's forests continue to mature as larger trees and an increase in inventory volume were recorded. A separate study of tree seedlings revealed a general lack of regeneration in one-third to one-half of the stands in which regeneration should be adequate.
McWilliams, William H.; Alerich, Carol A.; Devlin, Daniel A.; Lister, Tonya W.; Sterner, Stephen L.; Westfall, James A. 2002. Annual inventory report for Pennsylvania''s forests: results from the first two years. Resour. Bull. NE-156. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 71 p. https://doi.org/10.2737/NE-RB-156.