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How robots may rule farms in future

15 July 2013 Last updated at 14:06 BST

Much of the work that needs to be done on farms in tiresome and labour-intensive, but could new technology revolutionise farming in the future?

The Lettuce Bot is just one the many robotic machines in development in the US, as researchers look for ways to increase efficiency and cut costs.

Faye Hawker reports.