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Photographic guide to selected external defect indicators and associated internal defects in black walnutAuthor(s): Everette D.Beaton John A. Rast; David L. Sonderman; David L. Sonderman
Source: Res. Pap. NE-617. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 24 p.
Publication Series: Research Paper (RP)
Station: Northeastern Research Station
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DescriptionTo properly classify qr 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. This guide aids the individual in identifying the surface defect indicator and also shows the progressive stages of the defect throughout its develqpment for black walnut. It illustrates and describes 10 types of external defqct indicators and associated defects that are particularly difficult to evaluate.
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CitationRast, Everette D.Beaton John A.; Sonderman, David L. 1988. Photographic guide to selected external defect indicators and associated internal defects in black walnut. Res. Pap. NE-617. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 24 p.
KeywordsDefect identification, photo guide, black walnut, quality assessment
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