STUDY OF SOME ECONOMICAL CRITERIA EVALUATION THROUGH USING DIFFERENT MECHANIZATION SYSTEMS UNDER SEMI ARID CONDITIONS. Mesopotamia Journal of Agriculture, [S. l.], v. 36, n. 4, p. 190–195, 2008. DOI: 10.33899/magrj.2008.27363. Disponível em: https://magrj.uomosul.edu.iq/index.php/magrj/article/view/57691. Acesso em: 30 sep. 2026.