The familiar Rig and furrow marks in the Buchans field are exceptionally well preserved due to the fact that heavy machinery was rarely used here. These marks represent the way in which earth was built along the centre of a long strip or rig of land with drains or furrows at either side. This is how crops were grown up until the 17th century before enclosure with hedges and fences took place, as well as great social changes, improved farm machinery, etc., all of which altered the way in which fields were ploughed and managed (Blair 1976).