An agricultural tillage implement comprising a main frame and configured to be pulled in a direction of motion through a field, the tillage implement comprising: at least one gang assembly having a plurality of disc blades, the gang assembly including a transverse support bar attached to the main frame, wherein each of the plurality of disc blades is suspended from the support bar with a disc hanger assembly; characterized in that the tillage implement further comprises a disc adjustment mechanism that is configured to pivotably attach the disc hanger assembly for each of the plurality of disc blades to the support bar so that a disc angle of the disc blades relative the direction of motion may be adjusted, the disc adjustment mechanism comprising: a pivot mount for each of the plurality of disc blades, each pivot mount comprising a pivot connected to the support bar and configured to pivot the pivot mount about a pivot point, a first arm connected to the disc hanger assembly and extending from the pivot, and a crank arm extending from the pivot; a shuttle, wherein the crank arms of each of the pivot mounts are attached to the shuttle such that movement of the shuttle causes each pivot mount to pivot and adjust the disc angle of the associated disc blade; and an actuator configured to move the shuttle relative the support bar in order to position the crank arms for each of the disc blades; wherein the disc hanger assembly is configured to position the disc blade such that a vertical center line of the disc blade extends through the pivot point of the pivot. at least one gang assembly having a plurality of disc blades, the gang assembly including a transverse support bar attached to the main frame, wherein each of the plurality of disc blades is suspended from the support bar with a disc hanger assembly; characterized in that the tillage implement further comprises a disc adjustment mechanism that is configured to pivotably attach the disc hanger assembly for each of the plurality of disc blades to the support bar so that a disc angle of the disc blades relative the direction of motion may be adjusted, the disc adjustment mechanism comprising: a pivot mount for each of the plurality of disc blades, each pivot mount comprising a pivot connected to the support bar and configured to pivot the pivot mount about a pivot point, a first arm connected to the disc hanger assembly and extending from the pivot, and a crank arm extending from the pivot; a shuttle, wherein the crank arms of each of the pivot mounts are attached to the shuttle such that movement of the shuttle causes each pivot mount to pivot and adjust the disc angle of the associated disc blade; and an actuator configured to move the shuttle relative the support bar in order to position the crank arms for each of the disc blades; wherein the disc hanger assembly is configured to position the disc blade such that a vertical center line of the disc blade extends through the pivot point of the pivot. a pivot mount for each of the plurality of disc blades, each pivot mount comprising a pivot connected to the support bar and configured to pivot the pivot mount about a pivot point, a first arm connected to the disc hanger assembly and extending from the pivot, and a crank arm extending from the pivot; a shuttle, wherein the crank arms of each of the pivot mounts are attached to the shuttle such that movement of the shuttle causes each pivot mount to pivot and adjust the disc angle of the associated disc blade; and an actuator configured to move the shuttle relative the support bar in order to position the crank arms for each of the disc blades; wherein the disc hanger assembly is configured to position the disc blade such that a vertical center line of the disc blade extends through the pivot point of the pivot.