This research investigated how adding biochar to agricultural soils affects their long-term carbon storage capacity and soil health. The study found that applying biochar at moderate rates (50-60 tons per hectare) created the best conditions for soil improvement and carbon storage after 10 years. This has important implications for sustainable agriculture and climate change mitigation. Impacts on everyday life: • Helps farmers make better decisions about soil amendments for long-term soil health • Contributes to fighting climate change through improved soil carbon storage • Provides guidance for more sustainable agricultural practices • Demonstrates how to optimize biochar use for better crop growing conditions • Shows potential for reducing agricultural greenhouse gas emissions