CONTENTS: 1. Introduction and Evolution of Agricultural Extension. 2. Communication Process and its Model. 3. Methods of Communication. 4. Audio-Visual Aids. 5. Diffusion and Adoption of Innovation. 6. Cyber Extension and ICT in Agriculture. 7. Major Extension Programmes for Rural Development. 8. Role of Farm Journalism in Agricultural Development. 9. Introduction to Agricultural Economics. 10. Theory of Costs-Traditional to Modern. 11. Market Structure. 12. Introduction to Agricultural Finance and Credit. 13. Factor Product Relationship. 14. Problems in Agriculture Marketing. 15. Suggestions to Improve Agricultural Marketing.