The implement comprises an angular transmission box 1 fixed to the protective tube 6 of the drive shaft 2 coupled to the heat engine or electric motor on the one hand, and to the box 1 on the other hand, by means of a sleeve 4 keyed onto the input shaft 5 of the box. The box 1 comprises an output shaft extending laterally on each side of the box by a shaft end 9, 10 on each of which is fixed a crank 11, 12 provided with an articulation 13, 14 receiving the end of a spade-carrying arm 15, 16 sliding in bearings 17, 18 articulated as a clevis 17, 18 on an orientable support 21 fixed on each side of the box. The end of each arm 15, 16 receives a removable spade 22, 23, the spades being protected by an orientable articulated hood. The box may receive, on its shaft ends 9, 10, instead of the drive cranks for the spade-carrying arms, other tools such as a disc provided with teeth and a saw. <IMAGE>
