Growth Gains from Moving Black Walnut Provenances Northward
Abstract:In 1967, black walnut (Juglans nigra L.) seedlings from 15 to 25 provenances were planted at eight locations in the Midwest. In 1973, a similar plantation was established near Yoncalla, Oregon. Results show that, within the species' natural range, provenances can be moved as much as 200 miles northward without the likelihood of cold damage. In general, growth of trees from southern sources exceeds that of trees from northern sources.
Document Type: Journal Article
Affiliations: Principal Plant Geneticist, Southern Forest Experiment Station, USDA Forest Service, Gulfport, Mississippi
Publication date: October 1, 1980
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