A system for an agricultural implement includes first and second actuators (32-1, 32-2) disposed to apply a force to respective first and second row units (10) of the implement, each actuator having a down chamber (33) and a lift chamber (35). Each down chamber (33) is in fluid communication with a respective downpressure control device (320-1, 320-2). Each up chamber (35) is in fluid communication with a common lift pressure control device (310).
