Horses, Oxen and Technological Innovation: The Use of Draught Animals in English Farming from 1066-1500The introduction of the horse brought many advantages to medieval English farming, particularly as an improvement to ploughing and hauling. But the replacement of oxen by horses was by no means inevitable, as the situation often depended upon a number of factors not immediately obvious to modern eyes. These factors, which included such environmental aspects as soil types and terrain, are evaluated to see how they affected the decision to use horses