leaves like Millingtonia hortensis, Azadiracta indica, Melia rubia do not hold dust to the same degree compared to horizontally arranged leaves of Grevillea robusta, Delonix regia, Anacardium occidentale, Tamarindus indica species bearing stiff, horizontal and elevated leaves with rough and hairy surface which hold large amount of dust particles. Similarly drooping leaves and branches have higher chances of dropping down dust during disturbance by agents like wind, animal etc. Free hanging leaves as well as swirling leaves are the main morphological characteristics of dust escaping efficiency as in Dalbergia sisso, Eucalyptus globulus, Acacia auriculiformis etc. Certain species acquire a peculiar type of leaves which are devoid of leaf damage and hurt. Such modification of leaf surface is highly favorable in dusty environment like stone quarry. Table 1: Plants arranged according to the weight of pollutants deposited in descending order S.No. Plant Species Average area of the leaves (Sq.m) Ave. weight of the pollutants (per sq. m) Standard error 1. Terminalia arjuna 0.002885 2.657 10.064 2. Tabubia argentina 0.006645 2.650 10.052 3. Eucalyptus globulus 0.0062382 2.546 10.046 4. Mangifera indica 0.0062224 2.468 10.038 5. Ficus bengalensis 0.0061165 1.842 10.032 6. Ficcus religiosa 0.0061254 1.012 10.024 7. Acacia auriculiformis 0.005917 0.946 10.020 8. Cassia fistula 0.005832 0.843 10.020 9. Tectona grandis 0.01708 0.769 10.018 10. Psidium guajava 0.0057262 0.752 10.016
Following is the methodology adopted for developing Plantation Species Matrix taking into consideration different characteristics which would help in scoring and ranking the species as per their importance. Table 9: Operational model for Plantation Species Matrix S.No. Parameters Score Remarks 1. Tolerant/Stressed 1/0 Tolerant species -1 Stressed species-0 2. Evergreen/Semi-deciduous /Deciduous 1//0.5/0 Evergreen trees and shrubs -1 Semi-deciduous -0.5 Deciduous-0 3. Growth Rate ( Fast/Quick/Slow) 1//0.5/0 Fast growing species – 1 Quick growing species-0.5 Slow growing species-0 4. Canopy Surface Area(CSA) 1 Tree/shrub species highest canopy surface area -1 Others scored as per relative to the tree with highest CSA 5. Leaf Area (LA) 1 Tree/shrub species highest leaf area-1; others as per the highest LA in database 6. Stomatal Index(SI) 1 Tree/shrub species having highest Stomatal index-1 Others as per the highest SI in database 7. Canopy Shape 1/0.75/0.5/0.25/0 Spreading canopy-1 Round canopy-0.75 Oblong canopy-0.5 Flat-crown canopy-0.25 Conical canopy-0
Criterion for flowering seasonality (Ecological conservation) Private Agencies Institutes Government agencies viz. Forest Department Farmers Others Total Weightage Criteria 1 Throughout the year 2 2 2 2 1 9 7.2 Criteria 2 At particular seasons 1 1 1 1 2 6 4.8 15 Criterion for utility (Economic sustainability) Private Agencies Institutes Government agencies viz. Forest Department Farmers Others Total Weightage Criteria 1 Non-Timber Forest Product (NTFP) 4 1 3 4 4 16 1.92 Criteria 2 Fuel wood 3 2 2 2 3 12 1.44 Criteria 3 Timber 3 4 3 2 3 15 1.8 Criteria 4 Paper & Pulp 3 3 4 3 3 16 1.92 Criteria 5 Ornamental 3 5 2 4 2 16 1.92 75 Criterion for rotation period (Economic sustainability) Private Agencies Institutes Government agencies viz. Forest Department Farmers Others Total Weightage Criteria 1 Long Rotation Period 3 3 2 2 1 11 3.193548387 Criteria 2 Medium Rotation Period 2 2 2 2 2 10 2.903225806 Criteria 3 Short Rotation Period 1 1 2 3 3 10 2.903225806 31 Note: In the questionnaire survey the parameter Rotation Period was being included but while preparing database Rotation Period has not been included due to the non availability of the information.