Concern about the relevance of work carried on by agricultural economists probably began three-quarters of a century ago with the appointment of Henry C. Taylor as the first professor of agricultural economics in a land grant institution. The dialogue has continued with changing emphasis during periods of depression; war years, overproduction, and structural changes that have occurred in the production sector resulting from the historic migration of farm workers to urban centers and out of agricultural employment. Castle in. 1970 warned that flexibility in organizational structure of research and extension activities would be necessary if programs were to have great relevance to fast-changing and non-static problems.