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STUDY OF SOME ECONOMICAL CRITERIA EVALUATION THROUGH USING DIFFERENT MECHANIZATION SYSTEMS UNDER SEMI ARID CONDITIONS. MAGRJ [Internet]. 2008 Dec. 1 [cited 2026 Sep. 30];36(4):190-5. Available from: https://magrj.uomosul.edu.iq/index.php/magrj/article/view/57691