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Growth and Winter Injury of Douglas Fir in a Three-Year Provenance Demonstration

Sixty-seven groups of 1-0 Douglas fir seedlings, and their seed source information, were received from J. W. Wright of Michigan State University in April, 1963s. The seedlings were planted early in May at Penn Nursery, near Potters Mills Penna., where they were used for demonstration purposes until large enough for field planting. For this reason they were arranged according to the latitude of the seed origin in three roughly longitudinal transects through the range of the species, representing the Pacific coast, interior Washington, and the Rocky Mountains, Each group was planted in one to several rows spaced 12 inches apart traversing the seedbed. Because the design purposely did not provide for replication or randomization, precise statistical analysis is not warranted.


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Author(s): Henry D. Gerhold

Publication: Tree Improvement and Genetics - Northeastern Forest Tree Improvement Conference - 1965