Fig. 4

Comparison of the three sets of allometric equations used in this study (local equations presented in this study, Jenkins et al. [11], and Forest Inventory and Analysis Component Ratio Method [FIA-CRM]). Comparisons are made for the three species that were destructively sampled in this study (Douglas-fir, lodgepole pine, and ponderosa pine), the total tree biomass and three components. The figure shows biomass for the trees in the FIA plots used in this study. Total biomass includes stump biomass, but excludes foliage since FIA-CRM does not estimate foliage biomass. Bole and bark biomass are combined for the sake of direct comparison since FIA-CRM does not separate these components. This component represents bole and bark of the merchantable portion of the tree between the 1-foot stump and 4-inch top