Pearson χ2 and Fisher’s exact test results on the significance of the relationship between growth classes and abiotic parameters, according to a null hypothesis H0 where tree growth is considered not influenced by specific local environmental conditions.zyx
| Parameters | Norway maple | Silver maple | Hackberry | Green ash | Honeylocust | Littleleaf linden | Siberian elm | All-species |
|---|---|---|---|---|---|---|---|---|
| Metal grating (Yes/No) | 0.00 a | 0.00 a | 0.00 a | 0.00 a | 0.00 a | - | 0.31 b | 0.00 a |
| Soil Cover (Yes/No) | 0.25 a | 0.08 a | 0.12 b | 0.01 a | 0.07 b | 0.25 b | 0.01 a | 0.04 a |
| Urban zones (5 Classes) | 0.00 a | 0.02 b | 0.00 b | 0.00 b | 0.00 b | 0.00 b | 0.00 a | 0.00 a |
| Surficial deposit (3 Types) | 0.00 a | 0.10 a | 0.07 b | 0.00 a | 0.00 a | 0.04 b | 0.23 a | 0.00 a |
| Aerial obstacles (Yes/No) | 0.00 b | 0.16 b | 0.00 b | 0.04 b | 0.46 b | 0.00 b | 0.07 b | 0.07 a |
| Underground obstacles (Yes/No) | 0.39 b | 0.17 a | 0.06 b | 0.01 b | 0.00 b | 0.00 b | 0.02 b | 0.00 b |
| Irradiation (5 Classes) | 0.00 a | 0.00 a | 0.00 b | 0.00 b | 0.00 a | 0.01 b | 0.00 b | 0.00 a |
| Street width (3 Classes) | 0.02 a | 0.04 a | 0.00 b | 0.00 a | 0.00 a | 0.00 b | 0.00 a | 0.00 a |
| Distance from tree to curb (3 Classes) | 0.01 b | 0.53 b | 0.04 b | 0.46 b | 0.00 b | 0.05 b | 0.75 b | 0.01 b |
| Tree pit soil volume (4 Classes) | 0.28 b | 0.05 b | 0.07 b | 0.04 b | 0.02 b | 0.01 b | 0.00 b | 0.00 b |
| Penetration resistance at surface (4 Classes) | 0.01 a | 0.03 a | 0.04 a | 0.00 a | 0.05 a | 0.96 a | 0.00 b | 0.00 a |
| Penetration resistance at 15 cm (5.9 in) (4 Classes) | 0.02 a | 0.00 b | 0.00 b | 0.00 a | 0.00 b | 0.00 b | 0.00 b | 0.00 a |
| Penetration resistance at 30 cm (11.8 in) (4 Classes) | 0.22 b | 0.00 b | 0.00 b | 0.03 b | 0.00 b | 0.18 b | 0.00 b | 0.00 a |
| Penetration resistance at 45 cm (17.7 in) (4 Classes) | 0.19 b | 0.00 b | 0.01 b | 0.13 b | 0.02 b | 0.36 b | 0.01 b | 0.00 b |
| Soil K - (5 Classes) | 0.47 b | 0.54 b | 0.03 b | 0.33 b | 0.25 b | 0.25 b | 0.00 b | 0.56 b |
| Soil Ca – (4 Classes) | 0.74 b | 0.37 b | 0.45 b | 0.78 b | 0.67 b | 0.11 b | 0.05 b | 0.09 b |
| Soil Mg – (4 Classes) | 0.67 b | 0.38 b | 0.28 b | 0.18 b | 0.05 b | 0.19 b | 0.41 b | 0.31 b |
| Soil Na – (5 Classes) | 0.44 b | 0.31 b | 0.13 b | 0.66 b | 0.02 b | 0.99 b | 0.52 b | 0.02 b |
| Soil Zn – (5 Classes) | 0.03 b | 0.40 b | 0.04 b | 0.19 b | 0.00 b | 0.06 b | 0.77 b | 0.07 b |
| Soil Cu – (5 Classes) | 0.41 b | 0.13 b | 0.18 b | 0.51 b | 0.01 b | 0.00 b | 0.28 b | 0.12 b |
| Soil Fe – (4 Classes) | 0.68 b | 0.07 b | 0.01 b | 0.83 b | 0.28 b | 0.10 b | 0.36 b | 0.46 b |
| Soil Mn – (4 Classes) | 0.06 b | 0.31 b | 0.08 b | 0.01 b | 0.06 b | 0.15 b | 0.00 b | 0.01 b |
| Soil P – (5 Classes) | 0.27 b | 0.52 b | 0.68 b | 0.28 b | 0.10 b | 0.71 b | 0.46 b | 0.53 b |
| pH – (5 Classes) | 0.51 b | 0.04 b | 0.37 b | 0.26 b | 0.81 b | 0.29 b | 0.12 b | 0.52 b |
| Soil organic matter (5 Classes) | 0.83 b | 0.42 b | 0.45 b | 0.08 b | 0.00 b | 0.43 b | 0.00 b | 0.01 b |