Estimación de volumen de Abies religiosa (Kunth) Schltdl. & Cham. en diferentes entidades federativas de México

Diameter and height are crucial parameters in forest inventories to determine the volume that is stored in the forest. The objective of this research was to generate an equation for eight federative entities that allows an accurate estimate of the timber volume of Abies religiosa in the center and south of the country. Around 2,747 trees were used to adjust equations of total tree roll volume, branch volume and total tree volume (vrta, vramas and vta). The following criteria were set for the selection of the best model; adjusted coefficient of determination, bias, mean error; as well as the graphical and numerical analysis of the residuals. Due to the lack of information on the branches, for Tlaxcala and Veracruz states only the total tree roll volume was obtained. The goodness of fit generated by the equations is reliable, since it explains more than 93% to the dependent variable, the errors are less than 0.47 m. These expressions are