CHEMISTRY AND TRANSFORMATION OF HUMUS COMPOUNDS IN SOME CALCAREOUS SOILS OF NORTHERN IRAQ. Mesopotamia Journal of Agriculture, [S. l.], v. 39, n. 2, p. 43–47, 2011. DOI: 10.33899/magrj.2011.30403. Disponível em: https://magrj.uomosul.edu.iq/index.php/magrj/article/view/58561. Acesso em: 29 sep. 2026.