Ranti, Lawal Amudalat, et al. “Influence of Pendimethalin and Hand Weeding on Mineral Composition of Maize, Cowpea and Their Intercrop”. Journal of Biological Research and Biotechnology, vol. 18, no. 2, Dec. 2020, pp. 1177-84, https://doi.org/10.4314/br.v18i2.6.