Curved cultivating disc with a straight cutting edge portion

A tillage implement, comprising:

• a frame;
• a plurality of ground engaging tools coupled to the frame, at least one of the ground engaging tools configured as a cultivating disc, the at least one cultivating disc comprising:
• an attachment portion positioned at a radial center of the cultivating disc, the attachment portion including at least one attachment feature configured to couple the cultivating disc to the frame of the tillage implement about an axis of rotation of the cultivating disc, wherein the attachment portion extends along a first plane perpendicular to the axis of rotation of the cultivating disc;
• a cutting edge portion positioned at a distal end of the cultivating disc relative to the axis of rotation;
• and
• a curved connecting portion positioned between and connecting the attachment portion to the cutting edge portion, the curved connecting portion having a concave side and a convex side, the curved connecting portion defining at least one radius of curvature,
• wherein the cultivating disc extends along the axis of rotation between a first side and a second side, the first side including the concave side of the curved connecting portion, the second side including the convex side of the curved connecting portion, and
• wherein the cutting edge portion extends along a second plane parallel to the first plane, with a surface of the cutting edge portion positioned on the second side of the cultivating disc being parallel to the second plane, the surface of the cutting edge portion positioned on the second side of the cultivating disc extending radially inwardly from the distal end of the cultivating disc towards the curved connecting portion.