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An assessment of volume-ratio functions for Eucalyptus globulus and E. nitens in Chile Ciencia e Investigación Agraria
Gilabert,Horacio; Paci,Carlos.
Volume-ratio and total volume models for Eucalyptus nitens and E. globulus grown in southern Chile were ftted independently. The validation process considered the bias and the total error in the volume estimates, as well as the age classes close to thinning and harvesting operations. Volume estimates from the system of functions (volume and ratio) were compared to the volume estimates from a taper function (Bruce model) to estimate the volume at different top stem diameters. The results indicated that general (as opposed to local) logarithmic functions performed better in their estimation of the total volume for both species, while a unique polynomial model was the best model for the ratio estimates for both Eucalyptus species. The system of functions...
Tipo: Journal article Palavras-chave: Eucalyptus; Models; Timber products estimates; Volume-ratio functions.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000100001
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