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Distance Measurements in Vegetation Study
- Ashby, William C.
- Ecology 1972 v.53 no.5 pp. 980-981
- tree trunk, trees, vegetation
- Plotless vegetation sampling including the quarter method results in a systematic bias if measurements "to the tree" are used in place of the center of the tree trunk. Widely used references show "to the tree" measurements which lead to overestimates of density, productivity, and other parameters.