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Early Growth of Black Walnut Trees From Twenty Seed SourcesAuthor(s): Calvin F. Bey; John R. Toliver; Paul L. Roth
Source: Research Note NC-105. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Publication Series: Research Note (RN)
Station: North Central Research Station
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DescriptionEarly results of a black walnut cornseed source study conducted in southern Illinois suggest that seed should be collected from local or south-of-local areas. Trees from southern sources grew faster and longer than trees from northern sources. Trees from southern sources flushed slightly earlier and held their leaves longer than trees from northern sources. For the 1969 season, height growth rate was best explained by the rainfall pattern. Diameter growth rate was more closely related to air and soil temperatures than to rainfall and soil moisture.
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CitationBey, Calvin F.; Toliver, John R.; Roth, Paul L. 1971. Early Growth of Black Walnut Trees From Twenty Seed Sources. Research Note NC-105. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Keywordsblack walnut, Illinois, seed source
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