Advances in the Application of Humic Acid in Agriculture: Impacts on Soil Fertility, Crop Growth, and Carbon Emissions

This review explores the application of humic acid in agricultural systems, focusing on its impact on soil fertility, chemical properties, biological activity, crop growth, and carbon emissions. Humic acid enhances the stability and diversity of organic matter in the soil, improves soil structure, and increases nutrient availability. Research shows that humic acid significantly promotes crop growth, boosts yield and quality, and reduces CO₂ emissions in agricultural systems. Through various activation methods, the effectiveness of humic acid can be optimized, further advancing its role in soil improvement and sustainable agriculture.