Remotely Piloted Aircraft and Random Forest in the Evaluation of the Spatial Variability of Foliar Nitrogen in Coffee Crop. - Diego Bedin Marin; Gabriel Araújo e Silva Ferraz; Paulo Henrique Sales Guimarães; Felipe Schwerz; Lucas Santos Santana; Brenon Diennevan de Souza Barbosa; Rafael Alexandre Pena Barata; Rafael de Oliveira Faria; Jessica Ellen Lima Dias; Leonardo Conti; Giuseppe Rossi (Remote. Sens., 2021)