| Improvement of planting | Cluster 1 | 3.18 | 0.25 | 11.785/0.00** | Cluster 3 > Cluster 1Cluster 3 > Cluster 4Cluster 4 > Cluster 1(Scheffe) |
| Cluster 2 | 3.65 | 0.20 |
| Cluster 3 | 4.22 | 0.18 |
| Cluster 4 | 3.66 | 0.31 |
| Improvement of paving | Cluster 1 | 3.33 | 0.26 | 13.467/0.00** | Cluster 3 > Cluster 1Cluster 3 > Cluster 4Cluster 3 > Cluster 2Cluster 4 > Cluster 1(Scheffe) |
| Cluster 2 | 3.58 | 0.32 |
| Cluster 3 | 4.36 | 0.14 |
| Cluster 4 | 3.82 | 0.25 |
| Improvement of installation | Cluster 1 | 3.30 | 0.31 | 11.105/0.00** | Cluster 3 > Cluster 1Cluster 4 > Cluster 1(Scheffe) |
| Cluster 2 | 3.69 | 0.19 |
| Cluster 3 | 4.28 | 0.17 |
| Cluster 4 | 3.87 | 0.30 |
| Harmony with landscape | Cluster 1 | 3.17 | 0.37 | 15.540/0.00** | Cluster 3 > Cluster 1Cluster 3 > Cluster 4Cluster 4 > Cluster 1(DunnettT3) |
| Cluster 2 | 3.38 | 0.39 |
| Cluster 3 | 4.26 | 0.07 |
| Cluster 4 | 3.85 | 0.22 |