Aday, S.H. and Al-muthafar, Y. 2019. 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, 1 (Mar. 2019), 15–24. DOI:https://doi.org/10.37077/25200860.2019.113.