Forests play an important role in regional and global carbon (C) cycles as they store large quantities of carbon invegetation (Brownetal., 1996). Because of their importance in the global C cycle, there is an increasing need to accurately estimate the amount of C (or biomass) forests contain (Brown and Lugo,1982; Birdsey, 1992). Information about above ground biomass (AGB) is necessary for estimating and forecasting ecosystem productivity, carbon budgets, nutrient allocation and fuel accumulation (Brown et al., 1999).