The ornamental design for a tillage implement, as shown and described.
FIG. 1 is a first perspective view of a tillage implement of the present invention,
FIG. 2 is a second perspective view of a tillage implement of the present invention,
FIG. 3 is a first plan view of a tillage implement of the present invention,
FIG. 4 is a second plan view of a tillage implement of the present invention,
FIG. 5 is a side elevation view of a tillage implement of the present invention; and,
FIG. 6 is a cross-sectional view of a tillage implement of the present invention shown along line A-A in FIG. 1.
The broken line shown across the surface of the claim in FIG. 1 indicates the viewing plane for the cross-sectional view shown in FIG. 6 and forms no part of the claimed design.