Table 1. Soil Aeration Treatments Used in Growth Studies at Two Charlotte, NC sites.
Treatment codeNumber of treesMachineProbe depth (cm)Fill materialFill volume (liters)Fractures per tree
Site: Douglas Airport - Willow Oaks (Quercus phellos)
GG Sty5Grow gun30Styrofoam insulation24
TL Comb5Terralift45/70Styrofoam ‘C’2 × 24
Supersorb ‘F’2 × 0.025
Core Ar5Core aerator8———
Water5Fert. needle20Water26
Control5—————
Site: Airport Freeway - Bradford Pear (Pyrus calleryana cv. ‘Bradford’)
GG Sty11Grow gun30Styrofoam insulation24
GG Sup11Grow gun30Supersorb ‘F’0.24
TL Sty11Terralift45/70Styrofoam ‘C’ Beads2 × 23
TL Sup11T erralift45/70Supersorb ‘F’2 × .0753
Core Ar11Core aerator8———
Water11Fert. needle20Water26
Control11—————