Parts of a 7th century "heavy plough" have been found in Kent, England. This discovery pushes back the first known instance of heavy plowing in England by several hundred years.
Archaeologists have found a coulter, which is a vertical soil slicer mounted like a knife to cut through the soil ahead of a plough. Ploughs like this were pulled by teams of 8 oxen and were considered high-tech agriculture in their time.
The coulter was found on the grounds of an Anglo-Saxon monastery and may have been placed in the foundation of a building deliberately. [photo]