By providing a control system in communication with a hydraulic system for adjusting an angle of smoothing tools of a harrow, and a communications system for determining a present geographic location of the tillage implement in communication with the control system, the angle of the smoothing tools can be adjusted according to presently determined coordinate locations on a map which indicates amounts of plant residue. This may allow an automated process in which smoothing tools can be continuously adjusted during a tilling session in order to provide the most aggressive setting for optimum field leveling and residue flow based on field conditions.
