'THE TRAILED HEAVY DUTY OFFSET DISC HARROW' trails behind the tractor and because of heavy design and weight can effectively break up heavy clods. And when green manures, trash or other surface growth is cross disced, the organic matter is effectively buried and mixed with the soil and decays rapidly into humus. The Harrow has a strong and sturdy main frame with boron steel discs and heavy duty chilled cast iron spools to provide center weight. Optional wheel can be provided for towing the road.