Management of potassium fertilization on the nutrition of maize hybrids - Silva, Fernanda de Fátima da; Luz, Pedro Henrique de Cerqueira; Romualdo, Liliane Maria; Peres, Celso Eduardo Bonafe; Strozzi, Gabriela; Pateis, Uanderson Henrique Barbieri; Herling, Valdo Rodrigues (World Congress of Soil Science, 2014)