Kerry J. Byrnes Collection, United States Agency for International Development. A.I.D. evaluation special study, no. 67. 43 pages., A.I.D.'s experience with farming systems research and extension (FSR/E) has been mixed. FSR/E projects have provided opportunities for developing country professionals to acquire training and field experience in this new approach to research. However, most projects have bot had the impact on technology development and transfer or institutionalization of FSR/E as had been assumed in project designs. This report, based on a case study review of evaluations of 12 A.I.D.-funded projects, synthesizes the Agency's experience with FSR/E from the mid-1970's to the mid-1980's and assesses the impact of these projects on agricultural development.