Extension Service Delivery Models and Agricultural Productivity in Nigeria: A Comparative Analysis

This study conducts a comparative analysis of different extension service delivery models and their agricultural productivity outcomes in Nigeria. Nigeria's extension system has evolved from the Training and Visit system to Agricultural Development Programmes, commodity-based extension, participatory extension, and private sector extension delivery. Each model has distinct organisational structures, financing mechanisms, and outreach methodologies with different effectiveness profiles. This study uses a comparative institutional analysis methodology, examining extension delivery models in six states representing all geopolitical zones: Kano, Lagos, Enugu, Benue, Kebbi, and Borno. Data sources include extension system reviews, ADP operational reports, farmer survey data from 60 farmers per state, and interviews with 30 extension administrators. Productivity outcomes are compared across model types using partial factor productivity measures. Findings reveal that farmer field school-based extension consistently produces the strongest productivity outcomes across commodity types, with an average 31 percent productivity advantage over T and V-style individual farm visit approaches. Private sector extension linked to input companies shows strong adoption outcomes for company-promoted technologies but narrower commodity coverage. Digital extension shows reach advantages but depth limitations. The study concludes that hybrid extension models combining farmer field schools with digital delivery offer the best reach-depth balance. It recommends a national extension system reform framework built around this hybrid approach.

Keywords: extension delivery models, agricultural productivity, Nigeria, farmer field schools, extension reform.