Musa, H. R. (2022). Vegetative Growth Responses of Castor (Ricinus communis) and Senna (Senna occidentalis ) to Low Dose Zinc (Zn) Spiking of Agricultural Soil in Kano, Northern Nigeria. UMYU Scientifica, 1(1), 268-273. https://doi.org/10.56919/usci.1122.034