Effects of leader topping and branch pruning on efficiency of Douglas-fir cone harvesting with a tree shaker

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Author

Donald L Copes

Contributions

Pacific Northwest Forest and Range Experiment Station (Portland, Or.) - Contributor

Publication

1985 - U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, Or., Oregon

Language

English

Word Count

0 words, Guess

Page Count

0 pages

Identifiers

Open LibraryOL13609455M

Subjects

Topics

Seeds Pruning Conifers Harvesting Douglas firDouglas fir -- PruningConifers -- Seeds -- Harvesting

Series Statement

Research note PNW -- 431

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