The Bihar Agricultural College, Sabour, now a constituent unit of Rajendra Agricultural University, Bihar has been the premier institution of agricultural education and research in the country. The college has got the distinction to start Postgraduate Teaching And Research in Extension Education for the first time in India. From very beginning, the thesis based on systematic research on various facets of Agricultural and Rural Development was made an essential requirement for the award of Postgraduate Degree. Therefore, it is natural that over a span of five decades a number of thesis have been awarded by this institution The present book is compilation of all the thesis research work related with the discipline of Extension Education in a systematic and organized manner. In view of historical importance of the discipline the book provides a eye view pertaining to the details of pioneer researches, which has been carried out in the state of Bihar since its inception.