Participatory research approaches are widely being used for promoting the uptake of agricultural integrated innovations. The methods encourage greater knowledge sharing among farmers and give them more confidence in the technology being promoted which in turn brings about wide adoption of the technology in question. Therefore, understanding efficiency and effectiveness of participatory research approaches can further the ultimate aim of encouraging sustainable technology adoption. This study sought to evaluate the efficiency and effectiveness of the participatory research approaches used in Babati. The study objectives included determining the characteristics of the popular participatory research approaches, comparing the socio-economic factors of farmers participating in the participatory research approaches, determining the effectiveness of the popular participatory research approaches and determining the economic efficiency of these participatory research approaches. Finally the incentives/ dis-incentives to farmers‟ participation in the popular participatory research approaches were determined. The target population for this study was maize-legume-livestock small-holder farmers and the organizations involved in the implementation of the participatory research approaches under the study in Babati District. Cross-sectional data was collected from a sample of 120 farmers by the use of multi-stage sampling. Questionnaires, semi-structured interviews and focus group discussion were used in collecting primary data. Secondary data was collected through documentary analysis from public and private organizations involved in the implementation of the popular PRAs in the district.