A comparison of measured heights and diameters of selected yellow-poplar phenotypes with expected heights and diameters based on soil, topographic, and climatic features
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Date
1982
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The Ohio State University
Abstract
Eighteen superior phenotypes of yellow-poplar (Liriodendron tulipifera) were selected in four stands in southeast and east central Ohio. Selection criteria were superior height, diameter, and form characteristics. Four trees surrounding each select tree were chosen as comparison trees. Height and DBH were predicted for the select trees and comparison tree means, using regressions on soil, topographic, and climatic variables. When the residuals (predicted minus measured) were examined, both select and comparison trees were taller than expected, but the select trees exceeded their predicted heights by a significantly greater amount. Mean diameter residuals showed the select trees to be slightly larger than predicted and comparison trees slightly smaller; however, neither residual was significantly different than zero at the 0.05 level. A paired t-test of the select and comparison residuals of each plot did show a significant difference between the select and comparison tree diameters.