Abstract
Abstract Although coarse root (diameter > 1 cm) biomass can account for approximately 30% of total biomass in forest ecosystems, coarse root biomass models are rarely available, especially for larger trees. In this study, we used a back-hoe excavator and pressurized water to excavate the coarse root systems of large size trees of Abies balsamea L., Picea mariana (Mill.) BSP, Pinus banksiana Lamb., and Populus tremuloides Michx. in the boreal mixedwood forest of central Canada in order to develop allometric equations that link stem diameter at breast-height (DBH) and height to coarse root biomass. All regressions for coarse root biomass using DBH or height alone, or both DBH and height as predictors were significant (R2 ≥ 0.796, P
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