1. AN ATTACHMENT FOR CONNECTING A HARROW IN TOWING RELATION TO A PLOW FRAME, THE FRAME HAVING A PLOW BEAM EXTENDED REARWARD TO ONE SIDE OF AND AT AN ANGLE TO THE DIRECTION OF MOVEMENT OF THE PLOW FRAME, THE ATTACHMENT COMPRISING: A FIRST MEMBER SECURED TO THE PLOW FRAME; A SECOND MEMBER SECURED TO THE HARROW AND MOVABLE IN A HORIZONTAL PLANE RELATIVE TO SAID FIRST MEMBER; AND RESILIENT, HINGED MEANS CONNECTING SAID MEMBERS TOGETHER TO FORM A SHAFT UNIT, SAID HINGED MEANS AT A LOCATION INTERMEDIATE THE ENDS OF SAID SHAFT UNIT, AND BIASING SAID MEMBERS TO MAINTAIN SAID MEMBERS AGAINST RELATIVE MOVEMENT, AND PERMITTING SAID SECOND MEMBER TO SWING IN A HORIZONTAL PLANE RELATIVE TO SAID FIRST MEMBER, SAID CONNECTING MEANS NORMALLY MAINTAINING SAID SECOND MEMBER AT AN ANGLE RELATIVE TO THE DIRECTION OF MOVEMENT OF THE PLOW FRAME.