Biogeographically, the state falls in three zones: Deccan Peninsula (Chotanagpur and Eastern Highlands), Lower Gangetic Plain and East Coast as per classification by Rodgers et al (2002). Meher-Homji (2001) has recognised three phytogeographic regions in the state, i.e., Deccan Plateau, Eastern Ghats and the Coastal Plains. The state is underlain largely by Precambrian rocks. The geological formations reflect a complex of igneous, metamorphic and sedimentary rocks with alluvial and coastal alluvial plains, each giving rise to distinct soil type which range from alluvial (coastal and riverine types) to lateritic and black cotton.
Vegetation in the Eastern Ghats ranges from moist deciduous type in the north to dry deciduous type in the south. These forests are composed of tropical, subtropical and temperate elements along with evergreen types which occur at high elevations
Salipur Autonomous College aims to bring together people having interest in flora and fauna and who enjoy being with nature, for the conservation of biological biodiversity. 'Biodiversity' refers to the various forms of life on earth. It can be related to an open home of different species (plants, animals, insects, birds, micro-organisms) forming a network among themselves. Optimum geographical and climatic conditions encourage rich species diversity. However, development activities by human race have led to extensive clearance of forests, expansion of agricultural land, filling up of wetlands leading to ecological imbalance. This has resulted in loss of biodiversity, in particular and severe alteration of evolutionary process of ecosystem and environment, in general. Salipur Autonomous College Biodiversity Club (SACBC) is a activity club of the departments of Botany and Zoology, which aims to bring together people having interest in flora and fauna, and who simply enjoy being outdoors with nature by exploring the rich diversity of this region, documenting it and working towards its conservation.