“Influence of inorganic fertilizers and cattle manure on copper solubility and uptake by Phaseolus vulgaris”, JBLD, vol. 19, no. 1 & 2, pp. 53–66, Aug. 2018, Accessed: Aug. 15, 2025. [Online]. Available: http://journals.aru.ac.tz/index.php/JBLD/article/view/217