Table 1.

Species, number of study trees and control trees, location, average diameters and percent of crown left after topping.

SpeciesStudy areaNumber of topped treesNumber of control treesAverage diam. of topped treesAverage diam. of controlsPercent of crown left after topping
cmcm
Beech, AmericanMaryland303019.623.950.4
HickoryMaryland282820.516.969.2
Oak, chestnutPennsylvania303030.530.052.4
Oak, northern redPennsylvania303037.438.957.2
Oak, whiteMaryland303024.321.348.3
Pine, VirginiaMaryland303018.418.062.7
SweetgumMaryland242419.726.239.3
SycamoreMaryland7743.252.736.1
Yellow-poplarPennsylvania303034.529.045.3