Bark scoring problem grafts in five douglas-fir seed orchards
Subtitle: a case history
By: Donald L. Copes.
Contributors: Pacific Northwest Research Station (Portland, Or.)
Series: Research note PNW -- RN-487.; Research note PNW -- 487.
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest Research Station
Published: 1989
Place of publication: Portland, Or
Language: eng
Number of pages: 12
Subjects: Douglas fir.; Grafting.
Notes: Caption title.

"March 1989."

Also issued online.