Journal of Agronomy and Field Innovations

Intensive agricultural systems rely heavily on chemical fertilizers to optimize crop yields, but this practice causes severe environmental degradation. This paper evaluates the environmental trade-offs of shifting from conventional practices to low-emission nutrient management strategies. Using a comprehensive, cradle-to-farm-gate Life Cycle Assessment (LCA) methodology, we analyze several alternatives: split application, precision variable-rate technology, nitrification inhibitors, and the integration of organic manures with cover crops.
Our findings indicate that precision variable-rate applications combined with nitrification inhibitors reduce overall nitrous oxide emissions by up to thirty-five percent. They also lower fossil resource depletion during the manufacturing phase. However, a major eco-efficiency paradox emerges. While some organic and slow-release strategies lower direct greenhouse gas emissions, they inadvertently increase terrestrial acidification and marine eutrophication potentials due to higher ammonia volatilization during storage and field application.
This study underscores the need to move beyond single-indicator environmental metrics. Sustainable policy design must prioritize site-specific, multi-criteria nutrient frameworks to avoid shifting ecological burdens across different impact categories.