Mulima I., et al. “Status and Distribution of Some Available Micronutrients in Sudan and Sahel Savanna Agro-Ecological Zones of Yobe State, Nigeria”. Journal of Environmental Issues and Agriculture in Developing Countries (JEIADC), vol. 7, no. 1, Nov. 2023, pp. 18-29, http://icidr.org.ng/index.php/jeiadc/article/view/264.