Acacia auriculiformis, A. catechu, Dalbergia sissoo, Eucalyptus camaldulensis, E. tereticornis and Leucaena leucocephala were planted in 1985 at Tarahara of Sunsari District in eastern Terai, Nepal to determine which species produce higher biomass for fuelwood production. Destructive sampling carried out in January 1991 showed that the green wood biomass varied from 19.5 tonnes/ha in E. tereticornis to 108.4 tonnes/ha in E. camaldulensis . Productivity of oven- dried wood biomass ranged from 1.1 tonnes/ha/year in E. tereticornis to 7.6 tonnes/ha/year in E. camaldulensis . Stocking was the highest (1776 stems per ha) in A. auriculiformis , and the lowest (528 stems per ha) in E. tereticornis . Percentage contribution of stemwood to total wood biomass was maximum (91.6%) in E. camaldulensis and minimum (72.7%) in A. catechu . Maximum accumulation of branchwood (27.3%) was observed in A. catechu . Due to variation in moisture content of tree species, the trend was not found similar in oven-dried wood biomass production particularly for stemwood of A. auriculiformis and E. tereticornis , branch wood of A. auriculiformis and D. sissoo . However, the rank of the five species in green wood biomass production was the same in oven-dried wood biomass production. Precision percent was found satisfactory in most cases (15.7 to 19.8%) for dry wood biomass, except E. tereticornis wherein it was too high for tree components and wood biomass of E. tereticornis (48.8 to 54.4%).