Investigations on the Use of the Method of Systematic Variations for Determining Nutrient Requirements of Maize (Zea mays). Tropical Agriculture, [S. l.], v. 47, n. 2, 1970. Disponível em: https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/4020.. Acesso em: 19 sep. 2024.