Estimating potentially toxic elements in Brazilian tropical soils with vis-NIR spectroscopy and machine learning - Saraiva, Paloma Cunha; Mendes, Wanderson de Sousa; Nascimento, Clistenes Williams Araújo do; Morais, Pâmalla Grazielly Carvalho de; Cardoso, Kaíque Mesquita; Nascimento, Carol Chaves; Demattê, José Alexandre Melo; Boechat, Cácio Luiz (Soil Security, 2025)