The present invention relates to an insert for a share for uprooting root crop, the insert having a first end adapted to form a portion remote from a cutting edge of the share, and a second end comprising an insert edge extending along an insert edge axis and adapted to form at least a portion of the cutting edge of the share, characterized in that the thickness of the insert, from the first end to the second end increases continuously and the second end has a thickness greater than a thickness of the first end. Further, the present invention relates to the replacement shares of root crop harvesting machines.
