2024, Vol. 4, Issue 2, Part C

Humic acid (HA), a complex mixture of organic substances formed through the decomposition of plant and animal matter, is increasingly recognized for its potential as a natural fertilizer in agriculture. In South Asian agricultural systems, characterized by intensive crop cultivation and challenges like soil degradation and nutrient depletion, HA has shown promise in enhancing soil fertility, improving crop yield, and reducing the reliance on synthetic fertilizers. This review explores the impacts of humic acid on citrus growth and yield in these regions, focusing on its role in nutrient uptake, soil structure enhancement, and stress tolerance. Studies indicate that HA applications can increase root growth, improve water retention in soils, and boost resistance to biotic and abiotic stresses. The integration of HA into citrus farming could lead to more sustainable agricultural practices, especially in the face of climate change and increasing food security concerns. Despite these benefits, the use of HA in citrus cultivation has been underexplored in South Asia, with research primarily focused on other crops. This paper synthesizes available research on the effects of HA on citrus trees, examines its role in soil health, and proposes a framework for further investigation in the region. Recommendations are made for integrating HA into existing citrus farming systems, emphasizing the need for region-specific studies and guidelines for optimal application methods.