Forest Inventory and Analysis National Program

Volume of Hardwood Growing Stock Trees per Acre of Timberland, 2002

Description

This map shows the spatial distribution of the nation’s volume of hardwood growing stock trees in 2002 as a percentage of county timberland area.


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.

Sources:

Distributor:

USDA Forest Service, Forest Inventory and Analysis.

Layers:

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

Definitions:

Growing Stock is defined as a classification of timber inventory that includes live trees of commercial species meeting specified standards of quality or vigor. Cull trees are excluded. When associated with volume, includes only trees 5.0 inches in diameter at breast height (dbh) (4.5 feet) and larger. Timberland is defined as forest land capable of producing crops of industrial wood (20 cubic feet per acre per year in natural stands) that is not withdrawn from timber utilization by statute or administrative regulation.