USDA Forest Service

Forest Inventory and Analysis National Program


Forest Inventory & Analysis
National Office
U.S. Forest Service
1400 Independence Ave., SW
Washington, D.C. 20250-0003

(703) 605-4177

United States Department of Agriculture Forest Service.

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All Live Merchantable Softwood Tree Biomass per Acre of Timberland, 2002


This map shows the spatial distribution of all live merchantable softwood tree biomass in tons per acre of timberland by county. On average, by county, there are 7 tons of merchantable softwood biomass per acre of timberland.

Use this map only to identify broad spatial trends. At the time of
assessment, data were not available for interior Alaska, the Pacific Basin, Puerto
Rico, U.S. Virgin Islands, and a small number of counties in the lower 48 states.



USDA Forest Service, 2002 RPA data, available at:


USDA Forest Service, Forest Inventory and Analysis.


USDA Forest Service, 2002 RPA data and the National Atlas of the United States.


Merchantable biomass is defined as the total ovendry, gross biomass (including bark) of a tree 5.0 inches DBH or larger from a 1-foot stump to a minimum 4-inch top DOB of the central stem.


Map 577 kb PDF

High resolution zipped
files for download:
Map 1348 kb- PDF
Map 2,825 kb - JPG

USDA Forest Service
Last Modified: October 18, 2007

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