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

Agricultural extension and advisory services increasingly face a problem that conventional technology-transfer models were not designed to solve: farm decisions must be made under shifting climate risks, imperfect forecasts, unequal resources and interacting production and livelihood objectives. This critical narrative review examines how advisory systems translate climate information and agricultural knowledge into feasible, equitable and adaptive decisions, drawing on peer-reviewed research published between 2000 and 18 August 2026 and relevant foundational contributions. The synthesis distinguishes climate responsiveness from the dissemination of climate-smart technologies and evaluates the evidence across decision usability, participatory learning, digital delivery, social inclusion, evaluation design and governance. Existing reviews establish important associations between information access, advisory interaction and changes in reported practice, yet access, awareness, adoption and sustained welfare effects remain analytically distinct. Evidence from participatory climate services is encouraging but frequently rests on self-reports or non-randomised comparisons; forecast quality and advice quality are seldom assessed jointly. Digital channels extend potential reach without eliminating barriers related to control of devices, literacy, language, trust and the capacity to act. Gender, geography and socioeconomic position influence both service use and the benefits of apparently accessible information. The review proposes an integrative decision-to-outcome framework in which forecast skill, translation, deliberation, material feasibility, institutional accountability and feedback constitute separate potential points of failure. Stronger claims about resilient livelihoods require multi-season comparisons, explicit treatment of distributional effects, attention to advisory opportunity costs and measurement beyond adoption indicators. A climate-responsive system is therefore better understood as a learning and public-service capability, rather than as a package of messages or prescribed practices. Policy priorities include decision-centred service design, appropriately combined delivery channels, protection of underserved groups and outcome-focused evaluation under climate uncertainty.