A tillage implement (10, 100) comprising: a frame connectable to a towing vehicle, the frame comprising a plurality of elongated transverse frame elements (13, 13a, 13b, 13c, 13d) and a plurality of elongated longitudinal frame elements (14, 14a, 14b, 114a, 114b) connected to the plurality of elongated transverse frame elements (13, 13a, 13b, 13c, 13d), the frame having a horizontal longitudinal axis parallel to a direction of travel of the tillage implement (10, 100) and a horizontal transverse axis perpendicular to the horizontal longitudinal axis when the tillage implement (10, 100) is in a deployed configuration to till a field; a first gang (32a, 132a) comprising a first toolbar and a first plurality of annular harrow tools (50, 50a, 150) mounted on the first toolbar, the first toolbar having a first vertical toolbar plane through a length of the first toolbar, each annular harrow tool (50, 50a, 150) of the first plurality of annular harrow tools having a first rotating circumferential cutting edge whereby a first vertical harrow tool plane passes through two diametrically opposed points (55a, 55b) on the first circumferential cutting edge, the first toolbar pivotally mounted on the frame to be rotatable about a first vertical rotation axis; a second gang (32b, 132b) comprising a second toolbar and a second plurality of annular harrow tools (50, 50b, 50b x, 50b y, 150) mounted on the second toolbar, the second toolbar having a second vertical toolbar plane through a length of the second toolbar, each annular harrow tool (50, 50b, 50b x, 50b y, 150) of the second plurality of annular harrow tools having a second rotating circumferential cutting edge whereby a second vertical harrow tool plane passes through two diametrically opposed points (55a, 55b) on the second circumferential cutting edge, the second toolbar pivotally mounted on the frame to be rotatable about a second vertical rotation axis; a linkage mechanism (60, 80, 180) disposed longitudinally between the first and second toolbars, the linkage mechanism (60, 80, 180) comprising a plurality of pivotally connected linkage arms, the first and second toolbars each pivotally connected to the linkage mechanism (60, 80, 180), the linkage mechanism configured to simultaneously rotate the first toolbar about the first vertical rotation axis and rotate the second toolbar about the second vertical rotation axis in an opposite rotational direction as the first toolbar during operation of the linkage mechanism; characterized in that there is provided at least one wheel (17, 21, 23) for supporting the frame on the field, the at least one wheel (17, 21, 23) mounted on the frame longitudinally forward of both the first and second gang or longitudinally rearward of both the first and second gang. a frame connectable to a towing vehicle, the frame comprising a plurality of elongated transverse frame elements (13, 13a, 13b, 13c, 13d) and a plurality of elongated longitudinal frame elements (14, 14a, 14b, 114a, 114b) connected to the plurality of elongated transverse frame elements (13, 13a, 13b, 13c, 13d), the frame having a horizontal longitudinal axis parallel to a direction of travel of the tillage implement (10, 100) and a horizontal transverse axis perpendicular to the horizontal longitudinal axis when the tillage implement (10, 100) is in a deployed configuration to till a field; a first gang (32a, 132a) comprising a first toolbar and a first plurality of annular harrow tools (50, 50a, 150) mounted on the first toolbar, the first toolbar having a first vertical toolbar plane through a length of the first toolbar, each annular harrow tool (50, 50a, 150) of the first plurality of annular harrow tools having a first rotating circumferential cutting edge whereby a first vertical harrow tool plane passes through two diametrically opposed points (55a, 55b) on the first circumferential cutting edge, the first toolbar pivotally mounted on the frame to be rotatable about a first vertical rotation axis; a second gang (32b, 132b) comprising a second toolbar and a second plurality of annular harrow tools (50, 50b, 50b x, 50b y, 150) mounted on the second toolbar, the second toolbar having a second vertical toolbar plane through a length of the second toolbar, each annular harrow tool (50, 50b, 50b x, 50b y, 150) of the second plurality of annular harrow tools having a second rotating circumferential cutting edge whereby a second vertical harrow tool plane passes through two diametrically opposed points (55a, 55b) on the second circumferential cutting edge, the second toolbar pivotally mounted on the frame to be rotatable about a second vertical rotation axis; a linkage mechanism (60, 80, 180) disposed longitudinally between the first and second toolbars, the linkage mechanism (60, 80, 180) comprising a plurality of pivotally connected linkage arms, the first and second toolbars each pivotally connected to the linkage mechanism (60, 80, 180), the linkage mechanism configured to simultaneously rotate the first toolbar about the first vertical rotation axis and rotate the second toolbar about the second vertical rotation axis in an opposite rotational direction as the first toolbar during operation of the linkage mechanism; characterized in that there is provided at least one wheel (17, 21, 23) for supporting the frame on the field, the at least one wheel (17, 21, 23) mounted on the frame longitudinally forward of both the first and second gang or longitudinally rearward of both the first and second gang.