A coulter disc mounting assembly for a tillage implement supports a coulter disc thereon to be angularly offset from the forward working direction of the implement. The tillage implement typically includes a frame supporting a plurality of tool shanks thereon, each having a mounting surface adapted for mounting a respective shovel opener thereon in which the mounting surface has a width which is substantially perpendicular to the forward working direction. The disc mounting assembly has a hub with a mounting surface for fastening against the mounting surface of one of the tool shanks in which the hub supports a coulter disc thereon such that the coulter axis is oriented non-perpendicularly to the forward working direction.
