Volume equations for the Northern Research Station's Forest Inventory and Analysis Program as of 2010

The U.S. Forest Service's Forest Inventory and Analysis (FIA) program collects sample plot data on all forest ownerships across the United States. This report documents the methodology used to estimate live-tree gross, net, and sound volume for the 24 States inventoried by the Northern Research Station's (NRS) FIA unit. Sound volume is of particular interest because it is used in live-tree biomass and carbon estimates. NRS currently uses four volume equations for each of four geographic regions.