Researchers developed equations to estimate the amount of Eucalyptus urophylla trees' aboveground biomass in East Nusa Tenggara. They used tree measurements like diameter and height to create accurate models. The study found that the stem of the trees had the most biomass, followed by bark, branches, and foliage. As the tree diameter increased, the stem contributed more to the total biomass. The equation lnŶ = lna + b lnD was the most reliable for estimating the aboveground biomass of E. urophylla. This method can help measure forests more efficiently in E. urophylla plantations.