The 6 Furrow anti Balance Plough:

The plough is a 6 furrow anti balance plough. The ploughs used in steam ploughing are shaped like a flattened out V . They have plough shares on each end of the V and the engine pulls the double ended plough across the field with one set of plough shares in the ground and at the far side of the field, the other end of the plough is dropped down to the ground and the engine at the other end of the field pulls the plough back.
( information from Robert Oliver, Steam Plough Club UK)