Soil, water and air environment and its microbial population, Population interaction: Neutralism, Commensalism, Synergism, Mutualism, Competition, Ammensalism, Parasitism, and Predation.
The Carbon cycle
Trophic relationship & immobilization of carbon within the biosphere
The Hydrogen cycle and Oxygen cycle
The Sulphur cycle
Other element cycles- Phosphorus, Iron, Manganese, Heavy Metals
Nitrogen fixation in symbiotic and free living system, photosynthetic and non-photosynthetic systems, oxygen and hydrogen regulation of nitrogen fixation, nitrification, denitrification and ammonifying bacteria. Pathway of nitrate assimilation in photosynthetic and non-photosynthetic systems, Transamination and deamination processes.
Environmental Pollution and its types, Environment impact assessment, Global environmental problems: Ozone depletion, UV- B, Green – House effect and acid rain.
Biotechnological approaches for management: Bioremediation and Biopesticides in integrated pest management.
Wastewater treatment – Aerobic process – activated sludge, oxidation ditches, and trickling filters, rotating discs oxidation ponds.
Anaerobic Process – anaerobic digestion, anaerobic filters up flow anaerobic sludge.
Solid Wastes: Sources and management (composting, vermiculture, methane production).