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of the tree.This "breast height" value is a measurement grandfathered from decades of forestry applications. It was developed because of the simplicity and ease of measurement. There is no one ideal height at which to measure girth. Tree trunks flare outward at their base. In some trees this flare or buttressing extends only a short distance up the trunk, while in others it may extend 30 ft or more up the tree, but the measurement is still taken at this default height for consistency. If the flare at the base of the tree extends above this default

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