Table 11 Evaluation of tree species gradation based on APTI, morphological parameters and socio-economic importance
From: Roadside air pollution in a tropical city: physiological and biochemical response from trees
S/no | Grading character | Terminalia catappa | Mangifera indica | Ficus platyphylla | Polyalthia longifolia |
|---|---|---|---|---|---|
1 | Air Pollution Tolerance Index | 3 | 3 | 3 | 3 |
2 | Type of plant | 0 | 1 | 1 | 1 |
3 | Plant size | 1 | 1 | 1 | 1 |
4 | Canopy structure | 1 | 2 | 2 | 0 |
5 | Laminar structure | Â | Â | Â | Â |
 (a) Leaf size | 1 | 1 | 1 | 1 | |
 (b) Texture | 1 | 1 | 1 | 0 | |
 (c) Hardiness | 1 | 1 | 1 | 0 | |
6 | Socio-economic value | 2 | 2 | 2 | 0 |
 Total (+) | 10 | 12 | 12 | 6 | |
 API (%) | 62.50 | 75 | 75 | 37.50 | |
 API Grade | 4 | 5 | 5 | 2 | |
Assessment | Good | Very good | Very good | Poor |