Jaleel, Cheruth Abdul, Zhao Changxing, K Jayakumar, and M Iqbal. 2008. “Low Concentration of Cobalt Increases Growth, Biochemical Constituents, Mineral Status and Yield in Zea Mays”. Journal of Scientific Research 1 (1):128-37. https://doi.org/10.3329/jsr.v1i1.1226.