Abstract
These tables were derived from data obtained during a 1982 inventory of 15 counties comprising the North Central Unit of Alabama (fig. 1). The data on forest acreage and timber volume were secured by systematic sampling method involving a forest-nonforest classification on aerial photographs and on-the-ground measurements of trees at sample locations. The sample locations were at the intersecting of a grid of lines spaces 3 miles apart. At each forest location, per acre estimates were obtained from 5 BA 37.5 point samples.
Citation
Forest Inventory and Analysis Research Work Unit 1983. Forest statistics for North-Central Alabama counties. Resour. Bull. SO-96. New Orleans, Louisiana: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 17 p.