Agricultural Extension and Rural Advisory Services: Theories, Approaches, Innovation Systems and Future Directions

Agricultural extension is increasingly expected to do more than disseminate production recommendations. Small-scale producers also require capabilities to evaluate commercial opportunities, negotiate with buyers, manage risk and participate in increasingly differentiated value chains. Yet market-oriented advisory reform is frequently conflated with privatised delivery, digital messaging or a simple increase in output sales. This critical narrative review examines the relationship between advisory institutions, rural entrepreneurial capabilities and inclusive market participation, drawing on verified peer-reviewed research and methodological reviews published up to 18 August 2026. It integrates perspectives from agricultural innovation systems, rural entrepreneurship, transaction-cost economics and programme evaluation. Evidence indicates that context-specific technical advice can improve knowledge and adoption, whereas effects on yields, profits and commercialisation are less consistent. Market information sometimes reduces information asymmetries, but documented null findings challenge the proposition that information alone overcomes bargaining, transport, liquidity and buyer-access constraints. Producer organisations and contracting can address coordination failures while also generating exclusion, dependency and unequal bargaining power. Digital channels offer additional reach, although their performance depends on trusted mediation, interactivity, affordability and the connection between advice and viable markets. Recent syntheses show potential gains from digital information and market-access interventions but also expose geographic concentration, selection bias and sparse cost evidence. The review develops a conditional account in which advisory services enable entrepreneurship only when knowledge can be converted into agency, productive capacity and credible transactions. It proposes an outcomes framework extending beyond training attendance or technology uptake to net returns, market terms, resilience, distributional equity and farmer control. Policy and research priorities concern pluralistic governance, service-provider accountability, bundled but carefully evaluated support, gender-responsive design and long-term assessment of commercially sustainable yet socially inclusive provision. The conclusion is not that extension should become uniformly commercial, but that market relevance must be pursued without sacrificing public-interest functions or excluding producers least able to pay.