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Bias and precision of the Barr and Stroud dendrometer under field conditions

, : Bias and precision of the Barr and Stroud dendrometer under field conditions. USDA Forest Service Research Paper, Intermountain Forest and Range Experiment Station (INT-186): 46

Field tests of the Barr and Stroud optical dendrometer in conifer forests in NW Montana disclosed a 1.19% positive bias in tree diameter measurements for each of three observers. No bias in height measurement was discovered. A 5.4% over-estimate in standing-tree volume measurement was attributed partly to bias in diameter measurement and partly to wide spacing of measurement points on tree stems.


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