Integrated Biochar and Humic Acid Application Enhances Soil Health and Oat Forage Productivity in the Agro-Pastoral Ecotone of North China
Soil degradation in the agro-pastoral ecotone of North China severely constrains the productivity of vital forage crops like oat (Avena sativa L.). While biochar and humic acid are known soil amendments, their combined synergistic effects and optimal application ratios remain poorly understood. This study aimed to inve...