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The knowledge of wood volume is essential to determine the logging productive potential of a forest plantation. However, as this variable isn't easily measurable it's necessary the obtainment by estimation. This study aims to select volumetric models and analyze the efficiency of three different methods to estimate the wood volume (form factor, form quotient and adjusted volumetric equation) to the species Pterogyne nitens Tul. in pure plantation in Vitoria da Conquista, State of Bahia, Brazil. The sampled trees were logged and rigorously cubed, andeight volumetric models were adjusted. The best models were selected based on the pondered value of the statistical parameters scores and residues distribution. Stoate model presented the best performance to estimate the bole volume and the total wood volume of Pterogyne nitens with bark. Nevertheless, for the bole volume, Koperzky and Gehrhardt model presented similar estimates as Stoate's, being also indicated to this species. Among the methods used to estimate volume, it is recommended the use of adjusted volumetric models. [ABSTRACT FROM AUTHOR]

The objective of this work was to select volumetric models and evaluate the efficiency of three methods to estimate the wood volume of Pinus caribaea in an evenaged stand in the city of Vitória da Conquista, BA. Trees were selected, felled and their cubage was rigorously measured for total individual and commercial volume, with and without bark. Eight volumetric models were adjusted to the volumes. Higher performance models were selected based on the weighted value of the statistical parameters scores. The volumes obtained with cubage measurement were compared to those obtained by form factor, form quotient and adjusted models. The Stoate model was the most efficient in estimating total and commercial volumes with bark. The Stoate model and the modified Naslund model had better performance in estimating the total and commercial volumes, respectively, without bark. The form factor and the volumetric models are recommended for accurately predicting wood volume for this species. [ABSTRACT FROM AUTHOR]