The objective of this work was to evaluate different models for estimating merchantable height, merchantable volume and volumes along the bole of Eucalyptus sp., in order to guarantee more accurate results for obtaining wood multiproducts. The taper models by Max & Burkhart (1976), Demaerschalk & Kozak (1977) and Parresol et al., (1987) were evaluated. Data from rigorous tree scaling of 16-year-old Eucalyptus sp., using 41 sample trees for model adjustment. Based on the residue graphic analysis and on the statistics bias (B), average of the differences (MD), and Standard deviation of differences (DPD), the Max & Bukhart model was found to fit better all evaluated variables than the others, followed by the Demaerschalk & Kozak model. The Parresol et al. model produced biased results except for the estimate of log volumes between 25% and 35% of the total height.
Multiproducts; forest inventory; equations
