An agricultural implement (10, 210) adapted to be moved by a vehicle in a forward direction of travel, the agricultural implement (10, 210) comprising: a first frame section (20, 220); a first ground-engaging tool (30, 230) coupled to the first frame section (20, 220); a controller; a lift device (55, 255) in communication with the controller and coupled to the first frame section (20, 220), the lift device (55, 255) configured for raising and lowering the first frame section (20, 220) with respect to the ground (45, 245) to move the first ground-engaging tool (30, 230) between a first ground-engaging tool (30, 230) transport position (57, 257) and a first pre-selected operating depth (58, 258); at least a second frame section (65, 85, 265, 285) coupled to the first frame section (20, 220) forward or rearward of the first ground-engaging tool (20, 220); at least a second ground-engaging tool (70, 90, 270, 290) coupled to the at least second frame section (65, 85, 265, 285); and at least one extendable and retractable actuator in communication with the controller and coupled to the first frame section (20, 220) and the at least second frame section (65, 85, 265, 285), the actuator configured to move the at least second ground-engaging tool (70, 90, 270, 290) between a at least second ground-engaging tool transport position (82, 102, 282, 302) and a at least second pre-selected operating depth (83, 103, 283, 303), characterized in further comprising a depth control device (105, 305) comprising a first sensor (110, 310) configured to sense an indication of the first pre-selected operating depth (58, 258) and generate a first signal (115, 315), at least a second sensor (120, 130, 320, 330) configured to sense an indication of the at least second pre-selected operating depth (83, 103, 283, 303) and generate at least a second signal (125, 135, 325, 335), and an implement control unit (140, 340) that is configured to receive the first signal (115, 315) and the at least second signal (125, 135, 325, 335) and generate a control signal (145, 345) to the controller, which is configured to adjust the lift device (55, 255) and the at least one actuator to maintain a substantially constant first pre-selected operating depth (58, 258) and the at least second pre-selected operating depth (83, 103, 283, 303). a first frame section (20, 220); a first ground-engaging tool (30, 230) coupled to the first frame section (20, 220); a controller; a lift device (55, 255) in communication with the controller and coupled to the first frame section (20, 220), the lift device (55, 255) configured for raising and lowering the first frame section (20, 220) with respect to the ground (45, 245) to move the first ground-engaging tool (30, 230) between a first ground-engaging tool (30, 230) transport position (57, 257) and a first pre-selected operating depth (58, 258); at least a second frame section (65, 85, 265, 285) coupled to the first frame section (20, 220) forward or rearward of the first ground-engaging tool (20, 220); at least a second ground-engaging tool (70, 90, 270, 290) coupled to the at least second frame section (65, 85, 265, 285); and at least one extendable and retractable actuator in communication with the controller and coupled to the first frame section (20, 220) and the at least second frame section (65, 85, 265, 285), the actuator configured to move the at least second ground-engaging tool (70, 90, 270, 290) between a at least second ground-engaging tool transport position (82, 102, 282, 302) and a at least second pre-selected operating depth (83, 103, 283, 303), characterized in further comprising a depth control device (105, 305) comprising a first sensor (110, 310) configured to sense an indication of the first pre-selected operating depth (58, 258) and generate a first signal (115, 315), at least a second sensor (120, 130, 320, 330) configured to sense an indication of the at least second pre-selected operating depth (83, 103, 283, 303) and generate at least a second signal (125, 135, 325, 335), and an implement control unit (140, 340) that is configured to receive the first signal (115, 315) and the at least second signal (125, 135, 325, 335) and generate a control signal (145, 345) to the controller, which is configured to adjust the lift device (55, 255) and the at least one actuator to maintain a substantially constant first pre-selected operating depth (58, 258) and the at least second pre-selected operating depth (83, 103, 283, 303).