This study evaluated the impact of irrigation technology adoption on farmers’ welfare in Kwara State, Nigeria. A multistage sampling procedure was employed for the selection of respondents for the study. The first stage  involved the purposive sampling of Oke-Oyi and Songa  irrigation scheme. The second stage involved random sampling of villages and communities where farmers that were involved in the irrigation scheme are located. The third stage involved the random and representative selection of irrigation farmers (treatment) and non-irrigation farmers (control). Farm-level and household-level primary data were obtained with the use of well-structured questionnaire and interview schedule from 348 respondents, from villages and communities covering a total of five (5) Local Government Areas.  Data were subjected to descriptive statistics and instrumental variable of two-stage least square regression model. The mean household size in this study was 7 individuals. The mean annual per capita income of low, middle and upper welfare terciles were N 9376.77, N 21018.17 and N 54 944.31 respectively. The coefficients of farm size of pepper and maize were positive and significant at 1 percentage levels. Irrigation adoption increases annual per capita income by 41.9% relative to that of a non-adopter. The annual per capita income increased by 1.7% for each additional year of schooling. It was concluded that, appreciable number of farmers were below  upper welfare terciles and education was vital to the adoption of irrigation technology. 



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