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A Crown Cover Chart for Oak SavannasAuthor(s): Jay Law; Paul Johnson; Gary Houf
Source: Technical Brief No. 2. St. Paul, MN. U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station.
Publication Series: Technical Bulletin
Station: North Central Research Station
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DescriptionAlthough oak savannas have been defined in many ways, they are characterized by scattered trees, largely comprised of oaks, and a sparse ground layer rich in grasses and forbs (Haney and Apfelbaum 1990). Nuzzo (1986, p. 11) more specifically defined oak savannas as plant communities "...dominated by oaks having between 10 and 80 percent canopy, with or without a shrub layer, and herbaceous cover, predominately a grassy layer, composed of both prairie and forest communities..." From these definitions, it is apparent that a certain range in crown coverage of trees is a characteristic of oak savannas central to their definition and thus their preservation, restoration, and management. This paper presents a crown cover chart for estimating the crown coverage of open-grown oaks and hickories in oak savannas and similar plant communities.
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CitationLaw, Jay; Johnson, Paul; Houf, Gary. 1994. A Crown Cover Chart for Oak Savannas. Technical Brief No. 2. St. Paul, MN. U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station.
KeywordsBasal area, stocking chart, Gingrich stocking diagram
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