The present work had for objective study taper of Eucalyptus dunnii Maiden, forassortment estimations. Data was collected in 4 properties of company Riocell S.A distributed along several municipalities of the Central Depression and Southeast Slope of the State of Rio Grande do Sul. The trees sampled were 6 to 7 years old, and were cubated by the Smaliam Method. The data was adjusted to a mathematic model to desenhe the trees taper, using the forward regression procedure. In the selection of the mathematic model the statistics coefficient of determination (R²), standard error in percentage (Syx %) as well as the residue analysis of the models were considered. The best estimation was obtained with the model: d i/ d = b0 + b1(h i/h) + b2(h i/h)² + b3(h i/h)³, with R² = 0.9577 and Syx = 8.14 %.
taper; eucalyptus; models
