Donald L. Copes
5 publications by Donald L. Copes:
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Removing Douglas-Fir Cones with a Lower-Crown Branch Shaker
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Publication: Tree Planters' Notes - Volume 49, Number 3 (2000)
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Topworking Coastal Douglas-fir
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Publication: Tree Planters' Notes - Volume 52, Number 1 (2007)
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Field Testing a Modified Duster for Supplemental Mass Pollination in Douglas-fir Seed Orchards
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Publication: Tree Planters' Notes - Volume 46, Number 4 (1995)
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Effect Of Rootstock Vigor On Leader Elongation, Branch Growth, And Plagiotropism In 4- And 8-Year-Old Douglas-Fir Grants
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Publication: Tree Planters' Notes - Volume 31, Number 1 (1980)
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Comparative Leader Growth of Douglas-Fir Grafts, Cuttings, and Seedlings
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Publication: Tree Planters' Notes - Volume 27, Number 3 (1976)
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