Artificial vision system for the identification of sulfur nutrition of corn plants - Luz, Pedro Henrique de Cerqueira; Silva, Fernanda de Fátima da; Romualdo, Liliane Maria; Marin, Mário Antonio; Herling, Valdo Rodrigues; Bruno, Odemir Martinez; Zuniga, Alvaro Gomez (International Congress of the European Soil Science Societies (EUROSOIL 2012), 2012)