Concrete cracking associated with soil treatments and tree root growth. Means followed by the same letter do not differ significantly (SNK p = 0.05).
| Treatment | Number of replicates | Mean number of cracks in the concrete per replicate |
|---|---|---|
| Compacted soil | 6 | 0.17 a |
| Expanded slate structural soil | 6 | 0.83 a |
| Supported concrete | 6 | 1.00 a |
| Gravel-based structural soil | 6 | 2.83 b |