Conducted in Uruguay during 1965-68, this study compared adoption rates for selected agricultural practices between one area which received an extension program and one which did not; and sought relationships between selected characteristics of individual farmers and the adoption of new practices. Data came from interviews with 69 experimental and 50 control subjects. Adoption was assessed in relation to 21 independent variables. These were among the conclusions: (1) the recommended practices were technically appropriate; (2) sunflower and cultivated pasture projects in the experimental region contributed effectively to adoption; (3) socioeconomic characteristics, use of personal information sources (including extension agents), were significantly related to adoption behavior, but demographic characteristics were not; (4) farmers' self-perception of innovativeness and economic land classification, extension agents' perception of the amount of extension work and local propensity to change, and the adoption model developed for the experimental region, can all be used in predicting adoption; (5) farmers who are most likely to adopt recommended farm practice can be identified. (LY)