Mean cumulative trunk caliper increase in Liquidambar styraciflua and Ficus microcarpa 6 years after planting in five circular root barrier treatments, Riverside, CA, 1998.
| Barrier treatment | mm |
|---|---|
| Check | 160.0 a |
| 12 mil polyethylene | 156.0 ab |
| 5 gallon | 161.8 a |
| DeepRoot® | 159.7 a |
| 15 gallon | 143.9 b |
| Least significant difference (P = 0.05) | 12.6 |
| Species treatment | |
|---|---|
| Liquidambar | 149.1 a |
| Ficus | 162.8 b |
| Least significant difference (P = 0.05) | 8.0 |
| 2 × 5 factorial statistical effectsz | |
|---|---|
| Species (S) | *** |
| Barrier (B) | ** |
| S × B | NS |
↵zNS, *, **, *** = not significant, and significant at P = 0.05, 0.01, and 0.001, respectively; means followed by the same letter are not significantly different.