ENHANCING SOIL FERTILITY AND CROP PRODUCTIVITY THROUGH BIOCHAR AND ORGANIC AMENDMENTS IN SEMI-ARID AGROECOSYSTEMS

Abstract

Soil degradation and declining fertility remain among the most pressing challenges for global agriculture, particularly in semi-arid regions where erratic rainfall, nutrient depletion, and organic matter loss threaten crop sustainability. Over the past decade, biochar and organic amendments have emerged as promising solutions for restoring soil health and improving crop productivity while sequestering carbon and mitigating greenhouse gas emissions. This paper investigates the synergistic role of biochar and organic amendments—such as compost, manure, and green residues—in revitalizing semi-arid soils through physical, chemical, and biological mechanisms.

The study integrates field evidence and laboratory analyses from semi-arid ecosystems to evaluate changes in soil structure, water retention, nutrient dynamics, and microbial activity. It also examines the interactive effects of biochar particle size, feedstock type, and application rate on soil fertility and crop yield. Findings indicate that combining biochar with organic materials enhances nutrient availability, promotes microbial biodiversity, and stabilizes soil aggregates more effectively than either amendment alone. The paper argues that adopting biochar-based management practices can transform nutrient-poor soils into resilient agroecosystems capable of sustaining productivity under climate stress.