HERVIYANTI, .; PRASETYO, T. B.; AHMAD, F.; DARMAWAN, . The Properties of Humic Acids Extracted from Four Sources of Organic Matters and Their Ability to Bind Fe2+ at New Established Rice Field. JOURNAL OF TROPICAL SOILS, [S. l.], v. 15, n. 3, p. 237–244, 2018. DOI: 10.5400/jts.2010.v15i3.237-244. Disponível em: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/101. Acesso em: 29 jul. 2025.