Modeling and prediction of sulfuric acid digestion analyses data from PXRF spectrometry in tropical soils. Scientia Agricola, [S. l.], v. 77, n. 4, p. e20180132, 2020. DOI: 10.1590/1678-992X-2018-0132. Disponível em: https://www.revistas.usp.br/sa/article/view/182842.. Acesso em: 1 may. 2024.