An Amuthu Bana is a cord used to hold the yoke (Viyagasa) and plough (Nagula) together when bullocks plough paddy fields.
The Amuthu Bana ties the Viyagasa and Nagula together.
The Amuthu Bana should be sturdy enough to hold the Nagula and Viyagasa together when bullocks drag the nagula across the paddy field. A small ridge is made at the center of the Viyagasa to place the nagula and to allow the Amuthu Bana to fasten the two tools.
Traditional farmers commonly made the cord out of deer and sambar deer skin or raw rind of coconut shafts. Sometimes rinds of trees such as Lihiniya and Nawa were also used. The rinds are well-leavened and dried before use.