Evaluation of the artificial vision system to diagnose potassium status in maize plants - Romualdo, Liliane Maria; Luz, Pedro Henrique de Cerqueira; Silva, Fernanda de Fátima da; Marin, Mário Antônio; Herling, Valdo Rodrigues; Bruno, Odemir Martinez; Zuniga, Alvaro Gomez (Technological advancement for vibrant agriculture, 2014)