Abstract: A ground-working tool including a shank and a sub-soil point at the bottom end of the shank. The sub-soil point has a leading cutting edge transverse to and in front of the longitudinal axis of the shank, a back portion behind the shank, a top portion from the leading edge to the shank, a bottom portion, and opposite lateral sides. A soil-rolling surface on at least one of the opposite lateral sides of the sub-soil point, each soil-rolling surface being concave in cross-section between top and bottom edges along a front to back length.