Abstract: A workhead for mounting on a boom (15) attached to a tractor. The workhead has a supporting housing (20) which provides mountings for attachment to the boom (24, 26), forward and rearward supporting rollers (21 and 23 resp.) both disposed on a horizontal axis transverse to the line of forward motion of the head, an outer roller (22) on a horizontal axis at an angle to the other rollers and a horizontally rotating shaft (35) with a plurality of blades (36, 37) operable to function as a mower, slasher or rotary hoe. The blades are mounted to be freely rotatable in one angular direction but are locked (65) against rotation in the other.