Halima Musa Rabiu 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 (Sep. 2022), 268–273. DOI:https://doi.org/10.56919/usci.1122.034.