Ground working apparatus including coulter and shovel for use with liquid fertilizer injector

A ground working apparatus for use with an agricultural implement having a toolbar arranged to be displaced across ground in a forward working direction, the ground working apparatus comprising:

• a mounting bracket arranged to be mounted on the toolbar in fixed relation to the toolbar;
• a disc arm extending downwardly and rearwardly between an upper end of the disc arm and a lower end of the disc arm;
• an upright pivot assembly pivotally coupling the upper end of the disc arm relative to the mounting bracket such that the disc arm is pivotal about an upright axis relative to the mounting bracket;
• a coulter disc rotatably supported on the lower end of the disc arm so as to form a cut in the ground when displaced in the forward working direction, the coulter disc being rotatable about a disc axis;
• the upright pivot assembly preventing upward movement of the coulter disc relative to the mounting bracket;
• a tool shank extending downwardly and rearwardly between an upper end of the tool shank and a lower end of the tool shank;
• a lateral pivot assembly pivotally coupling the upper end of the tool shank relative to the disc arm such that the tool shank is pivotal relative to the disc arm about a lateral axis while being pivotal with the disc arm about the upright axis of the upright pivot assembly;
• a pressure mechanism arranged to prevent upward pivotal movement of the tool shank relative to the disc arm until an upward pressure applied to the tool shank exceeds a prescribed holding force of the pressure mechanism;
• and
• a shovel supported on the lower end of the tool shank to form an undercut trough connected to the cut in the ground for receiving fertilizer from a fertilizer injector supported rearwardly of the tool shank;
• wherein the lateral axis of the lateral pivot assembly is forward of the disc axis of the coulter disc.