Equation 10^{y} | Dieback angle (live oak) = 13.3 + 0.735 angle of cut r^{2} = 0.611, regression model P < 0.001 |

Equation 11^{z} | Dieback angle (shumard oak) = 18 + 0.667 angle of cut r^{2} = 0.276, regression model P < 0.001 (one outlying datum removed) |

Equation 12^{z} | Dieback angle (shumard oak) = 27 + 0.798 angle of cut − 2.24 initial cut diameter r^{2} = 0.356, regression model P < 0.001 |