Photographic guide to selected external defect indicators and associated internal defects in black walnut

Everette D.Beaton John A. Rast; David L. Sonderman

doi:10.2737/NE-RP-617

Treesearch

Photographic guide to selected external defect indicators and associated internal defects in black walnut

Informally Refereed

Authors:

Everette D.Beaton John A. Rast, David L. Sonderman

Year:

1988

Type:

Research Paper

Station:

Northern Research Station

DOI:

https://doi.org/10.2737/NE-RP-617

Source:

Res. Pap. NE-617. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 24 p.

Download (PDF 12.80 MB)

Download (PDF 12.80 MB): https://research.fs.usda.gov/download/treesearch/21802.pdf

Abstract

To 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.

Keywords

Defect identification, photo guide, black walnut, quality assessment

Citation

Rast, 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.