off mechanism 14 rotates shaft 48 as shown by the directional arrow suitable clutch means etc as is known in the tractor power take off art are not shown at the end of shaft 48 is a novel gear 56 having a pair of opposed bevel gear faces 58 and 60 bevel gear 58 meshes with bevel gear 62 keyed to shaft 50 while bevel gear 60 meshes with bevel gear 64 keyed to cutter shaft 52 the power take off gears are such as to rotate the shaft 48 in a direction such that shafts 50 and 52 rotate in the direction opposite the direction of movement of a vehicle in a forward direction referring now particularly to fig3 through 5 the peanut vine root cutter 54 for each row is supported from a fixed shaft 64 supported from the digger inverter frame with the lower end of the shaft carrying a ball joint 66 the height of the lower end of the shaft is changeable by nut 68 and the threads on the shaft 66 the root cutter 54 in a preferred embodiment is about 4 inches long one inch wide and about 1 2 inch thick with serrations or such as zigzag teeth shown at 70 one end of the cutter has formed or attached thereto a ball 72 which rotates in the ball joint 66 the serrations are about 1 2 inch deep and 1 2 inch between the points thereof between the lower end of shaft 50 and end 74 of the cutter 54 is a helical spring 76 which functions as a universal joint and at the same time this spring permits cushioning of the cutter if large stones are encounter in its forward travel the entire cutter blade assembly 54 is adjusted to.