A VOLUME TABLE FOR PLANTED <em>ACACIA</em> <em>MANGIUM</em> IN PENINSULAR MALAYSIA

Abstract

Eight unweighted (including two logarithmic transformed) and seven weighted forms of volume equations were fitted by the least squares method to volume data of a 5-y-old Acacia mangium plantation. Furnival's index criterion was used to select the best fit equations, for overbark and underbark volumes. The logarithmic equation, adjusted for bias, was chosen as the most appropriate model for the species. The final equations, used to construct the overbark (Vo) and underbark (Vi) volume tables are:
Vo = 0.0003150 x D^1.54738 x H^0.80931,Vi = 0.0002707 x D^1.51310 x H^0.84789 where Vo and Vi are merchantable tree volumes (m3) up to 10 cm diameter overbark, D the breast height diameter (cm), and H the total log length (m). The equations were found to estimate a merchantable tree volume and hence the aggregate standing volume satisfactorily under the given study conditions. As usual, a test of applicability of these equations is needed if they are to be applied elsewhere.