Site-specific management zones delineation based on apparent soil electrical conductivity in two contrasting fields of Southern Brazil - Bottega, Eduardo Leonel; Safanelli, José Lucas; Zeraatpisheh, Mojtaba; Amado, Telmo Jorge Carneiro; Queiroz, Daniel Marçal de; Oliveira, Zanandra Boff de (Agronomy, 2022)