Micronutrient content in different compost mixtures derived from agricultural waste

The recycling of agricultural waste into compost represents a sustainable approach to improving soil fertility and supporting food production systems. While macronutrients in compost have been widely studied, information on micronutrient composition remains limited, despite its importance for crop quality and food security. This study evaluated the micronutrient content of compost produced from different agricultural waste mixtures, including crop residues, animal manure, and agro-industrial by-products. Compost samples were analysed for iron (Fe), zinc (Zn), copper (Cu), manganese (Mn), and boron (B) using atomic absorption spectrophotometry. Results showed that compost mixtures significantly influenced micronutrient availability, with combinations of plant residues and animal manure yielding higher and more balanced micronutrient profiles. The findings highlighted the potential of optimised compost formulations to enhance soil micronutrient status, contributing to sustainable primary food production and improved crop nutritional quality.