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The method of biomass estimation based on a volume-to-biomass relationshiphas been applied in estimating forest biomass conventionally through the meanvolume (m3 ha-1). However, few studies have been reported concerning theverification of the volume-biomass equations regressed using field data. Thepossible bias may result from the volume measurements and extrapolations fromsample plots to stands or a unit area. This paper addresses (i) how to verifythe volume-biomass equations, and (ii) how to reduce the bias while buildingthese equations. This paper presents an applicable method for verifying thefield data using reasonable wood densities, restricting the error in field dataprocessing based on limited field plots, and achieving a better understandingof the uncertainty in building those equations. The verified and improvedvolume-biomass equations are more reliable and will help to estimate forestcarbon sequestration and carbon balance at any large scale.

Reducing the uncertainty in the forest volume-to-biomass relationship built from limited field plots