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Is Tolerance the Capacity to Endure Shade?

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In 1917, the S.A.F. Committee on Terminology defined tolerance as the capacity of a species to endure shade. Proponents of the root competition theory have broadened the definition to include ability to withstand competition for soil moisture, soil nutrients, and other factors. The author presents evidence and arguments to show that tolerance of shade is not necessarily related to tolerance of low soil moisture, low nitrogen supply, low phosphate supply, and other environmental deficiencies. He, therefore, urges that shade tolerance be restricted to ability to survive in light of low intensity.

Document Type: Journal Article

Affiliations: Director, Allegheny Forest Experiment Station, Philadelphia, Pa., Formerly, Senior Silviculturist, Lake States Forest Experiment Station

Publication date: 1943-05-01

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  • 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.

    2015 Impact Factor: 1.476
    Ranking: 22 of 66 in forestry

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