Rosales, Manuel Palma, Francisco A. F. Mello, Sylvio Arzolla, and Maria D. Thomasi. 1987. “ Residual Effect of Some Nitrogenous Fertilizers in Corn Plant (Zea Mays L.) Evaluated by Dry Matter Production ”. Anais Da Escola Superior De Agricultura Luiz De Queiroz 44 (2): 901-25. https://doi.org/10.1590/S0071-12761987000200003.