Nitrogen variability assessment of pasture fields under an integrated crop-livestock system using UAV, PlanetScope, and Sentinel-2 data. - Francisco R. S. Pereira; J. P. de Lima; Rodrigo G. Freitas; Aliny A. Dos Reis; Laurence Rodrigues do Amaral; Gleyce Kelly Dantas Araújo Figueiredo; Rubens A. C. Lamparelli; Paulo Sergio Graziano Magalhães (Comput. Electron. Agric., 2022)