Aday, Shaker H., and Yarub Al-muthafar. “Comparison Study Between the Field Performance of a Movable Boards and Conventional Ditch Openers in Cultivated and Uncultivated Soils, Part 3: The Specific Resistance”. Basrah Journal of Agricultural Sciences 32, no. 1 (March 15, 2019): 15–24. Accessed April 23, 2024. https://bjas.bajas.edu.iq/index.php/bjas/article/view/54.