Estimating plant biomass is important in studies of plant community structure and function (Whittaker and Woodwell 1968, Reiners 1972, Skeen 1974, Johnson and Bell 1976, Schlesinger 1978, Ehrenfeld and Gulick 1981, Ehrenfeld 1986, Pavel 1993). Non-destructive methods of tree biomass estimation are becoming more commonly used since destructive methods are no longer permitted in many areas. Dimension analysis (Whittaker and Woodwell 1968) is a non-destructive method that utilizes species-specific regression equations that describe dimension/biomass relationships between plant components. Only a small amount of destructive sampling is required to initially establish these equations; subsequent work utilizing them is non-destructive. Rather than developing equations for each separate study, researchers can use equations published by others if their work is being conducted on the same species, in the same geographic area, and in the same general habitat type as that work which initially led to the equations. Equations for estimating total above ground biomass and biomass of separate plant components have been developed for several important southeastern hardwood tree species (Clark et al. 1985, Clark and Schroeder 1986).