AMER, Khaled Z. THE EFFECT OF TILLAGE SYSTEMS ON SOME MACHINARY UNIT PERFORMANCE INDICATARS AND OIL CORN YIELD. Diyala Agricultural Sciences Journal , [S. l.], v. 11, n. 1, p. 126–135, 2019. DOI: 10.52951/dasj.19110112. Disponível em: https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/1046. Acesso em: 30 apr. 2026.