Prasad, Govind, et al. “Effect of Nutrients Sources on Spring Maize (Zea Mays) and Its Residual Effect on Succeeding Basmati Rice (Oryza Sativa)”. The Indian Journal of Agricultural Sciences, vol. 90, no. 9, Oct. 2020, pp. 1690-4, https://doi.org/10.56093/ijas.v90i9.106597.