1. AN ATTACHMENT FOR USE WITH A BULLDOZER HAVING A STRAIGHT MOLDBOARD THAT COMPRISES: (A) A MOUNTING PLATE HAVING A PLURALITY OF BOLT HOLES POSITIONED FOR ALIGNMENT WITH SELECTED BOLT HOLES NORMALLY USED FOR ATTACHING A CUTTING EDGE TO SAID MOLDBOARD WHEREBY SAID MOUNTING PLATE CAN BE ATTACHED TO SAID MOLDBOARD; (B) A PLURALITY OF DEPENDING MEMBERS, EACH OF SAID DEPENDING MEMBERS INCLUDING A FORWARDLY EXTENDING PORTION, AND TWO DIVERGING REARWARDLY EXTENDING PORTIONS, ONE OF SAID REARWARDLY EXTENDING PORTIONS BEING OF GREATER CROSS SECTION THAN THE OTHER AT THE JUNCTION THEREBETWEEN; (C) MEANS CONNECTING THE OTHER OF SAID REARWARDLY EXTENDING PORTIONS TO THE FRONT OF SAID MOUNTING PLATE WHEREBY A REENTRANT OPENING IS DEFINED BETWEEN THE REAR OF SAID MOUNTING PLATE AND EACH OF SAID ONE REARWARDLY EXTENDING PORTIONS; (D) EACH OF SAID REENTRANT OPENINGS BEING OF A SHAPE WHEREBY WHEN SAID MOUNTING PLATE IS ATTACHED TO SAID MOLDBOARD THE LOWER FRONT PORTION OF SAID MOLDBOARD EXTENDS INTO SAID REENTRANT OPENINGS AND SAID REARWARDLY EXTENDING PORTION ABUTS AGAINST A BOTTOM SURFACE OF SAID MOLDBOARD; (E) ADJUSTABLE MEANS FOR DRAWING SAID REARWARDLY EXTENDING PORTIONS TIGHTLY AGAINST THE ABUTTING PORTION OF SAID MOLDBOARD; (F) A CUTTING BLADE HAVING A REAR CUTTING EDGE AND A FRONT CUTTING EDGE; AND (G) MEANS CONNECTING THE LOWER EXTREMITY OF EACH OF SAID DEPENDING MEMBERS TO THE CUTTING BLADE FOR SUPPORTING SAID CUTTING BLADE IN A HORIZONTAL PLANE BELOW THE BOTTOM OF SAID MOLDBOARD; (H) THE FORWARDLY EXTENDING PORTIONS OF SAID DEPENDING MEMBERS BEING OF VARIABLE LENGTH WHEREBY AT LEAST A PORTION OF SAID FRONT CUTTING EDGE AND SAID REAR CUTTING EDGE IS DISPOSED AT AN ANGLE TO THE LINE OF TRAVEL.