Climate Change and Sustainable Agriculture: Water, Soil, Carbon, Crops and Livelihoods in Transition

Climate-smart agriculture seeks to reconcile agricultural livelihoods with adaptation and mitigation, but the economic conditions supporting sustained adoption remain unevenly understood. This critical narrative review examines how incentives, production trade-offs and extension services interact to shape adoption, continued use and welfare outcomes. Scholarly literature published between 2010 and 22 July 2026 was selected through targeted discovery in accessible scholarly indexes, institutional repositories and citation chains. Evidence was appraised according to identification strategy, outcome measurement, time horizon and transferability rather than combined into a pooled adoption effect. The synthesis distinguishes three economic problems that are often conflated: privately unattractive practices with public environmental benefits, potentially profitable practices constrained by liquidity or risk, and uncertain practices requiring local learning. These problems justify different combinations of payments, finance, insurance and advisory support. Agronomic evidence does not establish universal gains across productivity, resilience and mitigation. Conservation agriculture, water management and diversification perform differently across production environments, while household labour allocation, residue uses, tenure and market access alter their private value. Experimental evidence shows that well-targeted advice and social learning can change management, but adoption responses do not consistently translate into higher profits or measured environmental improvements. Extension is therefore better understood as infrastructure for diagnosis, experimentation and coordination than as a mechanism for maximising uptake. Digital delivery can complement this infrastructure, although low delivery costs do not eliminate the costs of credible content, local adaptation and inclusive access. Carbon finance introduces additional concerns about payment timing, measurement uncertainty and benefit distribution. The review proposes a constraint-matched approach in which incentives address an identified economic obstacle, extension supports informed choice, and performance is judged by durable, risk-adjusted welfare and independently measured environmental outcomes. Priority research should connect multi-season adoption trajectories with household welfare, programme costs and landscape-level effects, while testing who benefits and who bears transition risks.