Aday, S. H. ., & Al-Muthafar, Y. W. . (2018). Comparison between the performance of a movable boards ditch opener and conventional ditch opener in cultivated and uncultivated soils Part 1: The draft force. Basrah Journal of Agricultural Sciences, 31(1), 85–92. https://doi.org/10.37077/25200860.2018.81