Traces the study of knowledge utilization through three waves. First (1920-1960) involved studies about the diffusion of agricultural innovations to farmers. The second (1960-1980) emphasized both the dissemination and use of innovations emerging from research and demonstration activities, and innovation adoption by organizations as well as individuals. The interlude (1980s) featured sharply reduced federal support for research about knowledge utilization. The third wave (1990-present) showed greater emphasis on federal partnerships with state and local entities to improve health, education, and human services. Interest also increased in policy, research and programmatic activities regarding knowledge utilization.