Search results for: Copes, Donald L.

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  1. 1

    Selection and propagation of highly graft-compatible Douglas-fir rootstocks, a case history

    Authors: Copes, Donald L.
    Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1981
    Physical Description: 8 pages : illustrations ; 28 cm.
    Government Document Book
  2. 2

    Rooting Sitka spruce from southeast Alaska

    Authors: Copes, Donald L.
    Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1987
    Physical Description: 8 pages ; 28 cm.
    Government Document Book
  3. 3

    Tree shaking machine aids cone collection in a Douglas-fir seed orchard

    Authors: Copes, Donald L.
    Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1983
    Physical Description: 8 pages : illustrations ; 28 cm.
    Government Document Book
  4. 4

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

    Authors: Copes, Donald L.
    Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1985
    Physical Description: 8 pages : illustrations ; 28 cm.
    Government Document Book
  5. 5

    Graft incompatibility in Pinus contorta

    Authors: Copes, Donald L.
    Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1975
    Physical Description: 9 pages : illustrations ; 27 cm.
    Government Document Book
  6. 6

    Effects of water suspension and wet-dry cycling on fertility of Douglas-fir pollen

    Authors: Copes, Donald L.
    Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2000
    Physical Description: 9 pages : illustrations., Also available via Internet from the PNRS web site (PDF file only). Address as of 10/20/00: http://www.fs.fed.us/pnw/pubs/rn527.pdf; current access is available via PURL.
    Connect to online resource - All users (Federal Depository Library Program Persistant URL)
    Government Document Microfilm Book
  7. 7

    Bark scoring problem grafts in five douglas-fir seed orchards: a case history

    Authors: Copes, Donald L.
    Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest Research Station, 1989
    Physical Description: 12 pages.
    Government Document Microfilm Book
  8. 8

    Selection and propagation of highly graft-compatible Douglas-fir rootstocks, a case history

    Authors: Copes, Donald L.
    Published: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1981
    Physical Description: 1 online resource (8 pages) : illustrations.
    Connect to online resource - All users (Federal Depository Library Program Persistant URL)
    Government Document Electronic eBook
  9. 9

    Vacuum collection of Douglas-fir pollen for supplemental mass pollinations

    Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1991
    Other Authors: “…Copes, Donald L.…”
    Physical Description: 8 pages : illustrations ; 28 cm.
    Government Document Book
  10. 10

    Improved laboratory methods for testing graft compatibility in Douglas-fir

    Authors: Gnose, Charles E.
    Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1975
    Other Authors: “…Copes, Donald L.…”
    Physical Description: 14 pages : illustrations ; 27 cm.
    Government Document Book