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Allelopathic Effects of Black Walnut on White Birches

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Abstract:

Heavy mortality and poor growth among repeated plantings of white birches were associated with toxic conditions produced by black walnut trees. Variation in response to toxicity was observed. Lethal effects were most prominent in the immediate vicinity of residual black walnuts, but some individuals survived in these areas, suggesting differences among trees in their levels of toxin tolerance. Birch trees were larger as distance from the source of toxicity increased, indicating a relationship between growth inhibition and toxin concentrate.

Document Type: Journal Article

Affiliations: Research Geneticist, USDA Forest Service, Northeastern Forest Experiment Station, Bington, Vt.

Publication date: April 1, 1975

More about this publication?
  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.
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