| This paper aimed to evaluate the accuracy of taper functions fitted with and without stratification on Pinus sp. trees. Three strata were allocated using diameter at 1.3 m above the ground, artificial form factor and Schiffel’s form quotient as stratification criteria. Schöepfer, Kozak et al. Hradetzky, Garcia et al., Ormerod and Demaerchalk taper functions were tested and the one which best fitted to the total population was selected by statistics standard error of estimate in percentage (syx%), adjusted coefficient of determination (R²aj.) and residual scatterplots. After this, the selected function was fitted with data stratified and the gain of accuracy was evaluated by two statistical methods. As results, Hradetzky’s function adjusted better when... |
