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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/noGrading characterTerminalia catappaMangifera indicaFicus platyphyllaPolyalthia longifolia
1Air Pollution Tolerance Index3333
2Type of plant0111
3Plant size1111
4Canopy structure1220
5Laminar structure    
 (a) Leaf size1111
 (b) Texture1110
 (c) Hardiness1110
6Socio-economic value2220
 Total (+)1012126
 API (%)62.50757537.50
 API Grade4552
AssessmentGoodVery goodVery goodPoor