Last edited by Tonris
Thursday, July 30, 2020 | History

2 edition of Effects of leader topping and branch pruning on efficiency of Douglas-fir cone harvesting with a tree shaker found in the catalog.

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

Donald L. Copes

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

by Donald L. Copes

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  • 20 Currently reading

Published by U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station in [Portland, Or.] .
Written in English

    Subjects:
  • Conifers -- Seeds -- Harvesting.,
  • Douglas fir -- Pruning.

  • Edition Notes

    StatementDonald L. Copes.
    SeriesResearch note PNW -- 431.
    ContributionsPacific Northwest Forest and Range Experiment Station (Portland, Or.)
    The Physical Object
    Pagination8 p. :
    ID Numbers
    Open LibraryOL17668978M


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Effects of leader topping and branch pruning on efficiency of Douglas-fir cone harvesting with a tree shaker by Donald L. Copes Download PDF EPUB FB2