A tilling apparatus for forming at least two spaced apart trenches on either side of a piece of land undisturbed by passage of the tilling apparatus over the piece of land, and having a form that is towable by or connectable to a motorized farm vehicle. The apparatus includes a rotary shaft cooperative with the motorized farm vehicle to receive rotational power therefrom through a transmission 6 for transmitting the rotational power, a framework arrangement 22 and a cutting assembly 40. The framework arrangement 22 comprises a front frame member, a top frame member and two side frame plates 28, 30. The front frame member extends transversely of the tilling apparatus between the two side frame plates 28, 30. The top frame member is located rearwardly of the front frame member. The front frame member and the top frame member are in spaced apart substantially parallel relationship to each other. The top frame member forms a cover over the cutting assembly for shrouding the cutting assembly 40 and separates the transmission 6 from the cutting assembly 40. The side frame plates 28, 30 are located at the ends of the cutting assembly 40. The cutting assembly 40 are rotatable with respect to the top frame member. The cutting assembly 40 includes groups of cutters connected to the rotary shaft at spaced apart locations along the length of the rotary shaft. The individual cutters of one group of cutters are located at spaced apart locations around the rotary shaft for forming one trench upon rotation of the cutters. The individual cutter comprises a first part 42 fixedly connected to the rotary shaft for rotation in accordance with corresponding rotation of the rotary shaft and a second part 44 for forming the trench, the second part 44 being located distally of and extending outwardly from the first part 42. The width of the trench formed by rotation of the second part of the cutter corresponds to the amount of extension outwardly of the second part of the cutter from the fi
