Yield and Economic Analysis of Maize Production Using Different Combinations of Combined Tillage Machines and Comparison to Conventional Tillage Systems . University of Thi-Qar Journal of agricultural research, [S. l.], v. 11, n. 2, p. 269–279, 2022. DOI: 10.54174/utjagr.v11i2.215. Disponível em: https://jam.utq.edu.iq/index.php/main/article/view/215.. Acesso em: 5 may. 2024.