This volume is a part of the three-volume compilation of 74 presidential addresses of the Indian Society of Agricultural Economics (ISAE) starting from 1940 to 2015 to commemorate the Platinum Jubilee year (2015) of ISAE. Each volume carries Introduction by three eminent economists: Prof V.S. Vyas (Volume 1), Prof S.S. Johl (Volume 2) and Prof Abhijit Sen (Volume 3). These introductions have not only added tremendous value to the volumes, but also provide a brief understanding of what is in the volumes. The knowledge system covered in the addresses, their interpretation, understanding of issues and profound policy analyses and recommendations made would be found very valuable by the students, teachers, and researchers in agricultural economics besides other stakeholders in agriculture. These volumes will be great reference source for those engaged in the study of agricultural economics.