Agricultural implements having row unit position sensors and at least one adjustable wheel, and related control systems and methods

A control system for an implement comprising a frame having an integrated elongate toolbar carrying at least one row unit and at least one wheel coupled to the frame, the control system comprising:

• an actuator connecting the at least one wheel to the frame;
• a sensor configured to sense a position of the at least one row unit relative to ground;
• and
• a controller configured to receive a signal from the sensor indicating the position of the at least one row unit relative to the ground and cause the actuator to raise or lower the frame based on the sensed position of the at least one row unit.