Minato, Evandro Antonio, Michel Esper Neto, Rodrigo Lima Sakurada, Tadeu Takeyoshi Inoue, and Marcelo Augusto Batista. 2017. “Foliar Macronutrient Levels and Production of Maize (Zea Mays L.) After Gypsum Application in an Oxisol”. Scientia Agraria Paranaensis 16 (2):219-24. https://saber.unioeste.br/index.php/scientiaagraria/article/view/14208.