Mean Root Deptha For Several Species On The Landfill and Control Plots
| Species | Landfill (inches) | Control (inches) |
|---|---|---|
| Japanese black pine | 3.1 | 3.7 |
| Norway spruce | 2.0 | 1.7 |
| Hybrid poplar (rooted cuttings) | 2.5 | 5.5 |
| Honey locust | 3.3 | 6.5 |
| Green ash | 3.7 | 5.8 |
| Hybrid poplar (saplings) | 3.3 | 5.0 |
↵a Spθcies are arranged from most tolerant to least tolerant of landfill soil conditions according to shoot and stem measurements.