Zinc Sorption in Calcareous Soils as Influenced by Biochar and Humic Acid: A Langmuir and Freundlich Isotherm Study. Euphrates journal of agricultural science, [S. l.], v. 18, n. 3, 2026. Disponível em: https://ejs-agri.com/index.php/EJAS/article/view/390. Acesso em: 2 nov. 2026.