serve to allow a marker bar or the like not shown in fig1 through 13 to be attached to the plow blade 440 located at the rear of the plow blade 440 at the bottom thereof is a back blade wearstrip 516 which is mounted onto the bottom plow frame member 444 and extends substantially across the width of the plow blade 440 the back blade wearstrip 516 has a plurality of apertures 518 therein and the bottom plow frame member 444 has matching tapped apertures 520 located in the rear facing side thereof bolts 522 are used in the back blade wearstrip 516 to mount it onto the bottom plow frame member 444 alternately if the apertures 520 are not tapped bolts and nuts could be used to mount the back blade wearstrip 516 onto the bottom plow frame member 444 optionally the apertures 518 in the back blade wearstrip 516 may be countersunk to recess the heads of the bolts 522 to the level of surface of the back blade wearstrip 516 the back blade wearstrip 516 is permanently mounted at an optimum angle with respect to the ground which is defined by the angle of the rear side of the bottom plow frame member 444 the rear of the bottom plow.