Ahmed H. H. Al-Jburi, Haider F. Mahmood, Kussay Ahmed Subhi. “Effects of Tilt Angle on the Performance of Disk Plough in Silty-Clay Soil”. Design Engineering (June 20, 2021): 1848 - 1857. Accessed April 30, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/2183.