M.K. SINGH, et al. “Efficacy of Slow Release Nitrogen-Fertilizers to Rice (Oryza Sativa) and Their Residual Effect on Wheat (Triticum Aestivum)”. Indian Journal of Agronomy, vol. 44, no. 1, Oct. 2001, p. 44_1 , https://doi.org/10.59797/ija.v44i1.3472.