Climate-Adaptive Farming: Strategies for Food Security and Adaptation Models Amid Rising Droughts and Population Pressures

Global agriculture stands at a critical inflection point, where the imperative to feed a growing population collides with mounting environmental constraints arising from excessive and poorly managed nutrient inputs. Nitrogen, the most widely applied macronutrient in modern farming, underpins crop productivity but simultaneously drives greenhouse gas emissions, reactive nitrogen pollution, eutrophication, and biodiversity loss when managed sub-optimally. Despite a growing body of literature, integration across disciplinary silos, including agronomy, soil science, atmospheric chemistry, environmental economics, and policy studies, remains limited. A narrative review was conducted to synthesise current scientific evidence on nitrogen and nutrient management strategies within the framework of climate-smart agriculture (CSA), aiming to identify pathways that enhance food security, mitigate climate change, and reduce environmental footprints. Drawing on peer-reviewed literature, intergovernmental reports, and authoritative databases published between 2000 and 2026, the chapter evaluates the agronomic, technological, and policy dimensions of fertiliser optimisation. Key themes addressed include the global nitrogen cycle and its disruption by anthropogenic inputs, the evolution of precision nutrient management technologies, the role of biological nitrogen fixation and organic amendments, the mitigation of nitrous oxide emissions, and the governance frameworks that enable sustainable nutrient stewardship. The review underscores that no single intervention is universally sufficient; rather, integrated approaches combining site-specific management, advanced sensing technologies, improved fertiliser formulations, circular nutrient economy principles, and enabling policy environments are necessary to reconcile productivity and sustainability goals. The study concludes by identifying persistent knowledge gaps and research priorities, whilst acknowledging the limitations of the evidence base reviewed.