Extension 591 Agricultural Extension 53 Agricultural extension 50 Extension education 44 Rural development 44 Extension Education 40 Extension-F 28 Motivation 25 Agriculture 24 Communication extension 24 Education 23 Educational Psychology Emotions 20 Extension Activities 20 Non-Formal Educaiton 20 Teaching and learning 20 Rural sociology 19 EXTENSION-F 17 Communication 16 EXTENSION 14 Economics 14 Learning 12 Teaching 12 Extension Teaching methods 11 Extension programme planning 11 Kerala agricultural university 11 Veterinary Extension 11 extension 11 rural development 11 Agricultural Economics 10 Educational psychology 10