Tree shaking machine aids cone collection in a Douglas-fir seed orchard
By: Donald L. Copes and William K. Randall
Contributors: Randall, William K; Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: Research note PNW -- 406
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
Published: 1983
Place of publication: [Portland, Or.?]
Language: eng
Subjects: Forest machinery -- United States; Seed orchards -- United States; Trees -- Seeds
Notes: Caption title

Distributed to depository libraries in microfiche

"July 1983."

Includes bibliographical references