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Title: An Index of Competition Based on Relative Crown Position and Size
Author(s): O'Neal, Dwight D.; Houston, Allan E.; Buckner, Edward R.; Meadows, James S.
Date: 1995
Source: In: Edwards, M. Boyd, comp. Proceedings of the eighth biennial southern silvicultural research conference; 1994 November 1-3; Auburn, AL. Gen. Tech. Rep. SRS-1. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station: 172-175
Description: A new competition index, the Crown Position Index (CPI) was evaluated using a 41-year-old, well stocked, upland hardwood stand in southwestern Tennessee. CPI wss based on relative crown position and crown size as expressed by crown projections and relative heights of crop trees and their competitors. Comparisons were made among CPI, the Hegyl (1974) index, and a value of Direct Sunligt from the Side (DSS). Correlations of each measure of competition with 1 and 2 year crop tree diameter growth were used as criteria for analysis. The highest r-values were calculated using DSS followed by the Hegyl index snd CPI respectively.
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