Photographic Guide of Selected External Defect Indicators and Associated Internal Defects in Yellow-Poplar

摘要

To properly classify or grade logs or trees, one must be able to correctly identify defect indicators and assess the effect of the underlying defect on possible end products. The guide assists the individual in identifying the surface defect indicator and shows the progressive stages of the defect throughout its development for yellow-poplar. Twelve types of external defect indicators and associated defects that are particularly difficult to evaluate are illustrated and described.