As a nursing mother, the tree has cradled the human being and human civilization since their infancy and is still playing the same role by providing man with food and shelter. As civilization progresses, man obtains from trees the lumber for his dwelling house and furniture, drugs for the treatment of his ailments, fruits and nuts for his food, paper for the advancement of his knowledge, rubber, cork and other materials for industry, ornaments for the decoration of the gardens and hundreds of other products for meeting his daily needs.

Beside all these things, its aesthetic value is also a prime thing. The beautiful green crown of the foliage is soothing to the eyes. The colorful flowers apply a healing touch to the disturbed and weary mind. The flower and the foliage of a plant beautify the surroundings and thus infuse health in our body and mind by their cheerful effect.

Trees suitable for moist areas are Alstonia scholaris, Bauhinia Variegata (Candida), Brownea Coccinea, Delonix Regia (Krishnachura), Polyalthia Lognifolia Pendula(Weeping Deodar), Tamarindus Indika (Tamarind).

Trees suitable for marshy areas are Barringtonia Acutangula (Indian Oak), Eucalyptus Rostrata, Hibiscus Tiliaceus (Cork Wood).

Trees suitable for dry areas are Acacia Auriculiformis, Cassia Fistula (Golden Shower), Erythrina Variegatum, Ficus Bengalensis (Banyan Tree), Plumeria Alba (Pagoda Tree).

Trees suitable for arid regions (e.g. where rain fall is scanty & high temperature) are Albizzia Lebek (Siris), Cassia Fistula (Golden Shower), Casuarina Equisetifolia (Casuarina).

Trees suitable for saline tracks are Acacia Auriculiformis, Butea Monosperma (Parrot Tree), Eucalyptus Citriodora (Lemmon Scented Eucalyptus), Heritiera Macrophylla, Inga Dulcis (Madras Thorn).