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Home → Publications → National Nursery Proceedings → 1966 → A 50-Year Racial Study of Douglas-Fir In Western Oregon And Washington

A 50-Year Racial Study of Douglas-Fir In Western Oregon And Washington

On the assumption that exact racial adaptation within each locality should have occurred in Douglas-fir west of the Cascades, the question was asked, "Do local seed sources really perform best 50 years after planting?" Primary source of information was the 50-year-old study of the U.S. Forest Service consisting of 13 races ranging elevationally from 100 to 3,850 feet and planted at 5 elevations ranging from 1,100 to 4,600 feet in western Oregon and Washington.


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Author(s): Roy R. Silen

Event: Western Forest Genetics Association
1965 - Olympia, Washington