Chemical characterization of the soils from black pepper (Piper nigrum L.) cultivation using principal component analysis (PCA) and Kohonen self-organizing map (KSOM)

Merisnet Ferde; Vinicius Câmara Costa; Rafael Mantovaneli; Nathalia Luiza Passamani Wyatt; Pablo de Azevedo Rocha; Geisamanda Pedrini Brandão; Jefferson Rodrigues de Souza; Ana Christina Wigneron Gimenes; Floriatan Santos Costa; Erik Galvão Paranhos da Silva; Maria Tereza Weitzel Dias Carneiro