Pictures from Cambridgeshire show firefighters tackling a blaze in a field next to the A11.
The blaze on the farm followed a car fire which broke out on the dual-carriageway southbound between Newmarket and Saffron Walden - in the Fulbourn area.
According to a witness, the field was ploughed earlier in the week.
The car fire broke out at around 12pm today (Sunday, July 10).
It is thought to have spread to nearby trees, and the field caught alight in turn.
The images show fire crews working to contain the blaze, and nobody is thought to be hurt.
Traffic was stopped while the authorities - including Cambridgeshire Fire and Rescue Service and National Highways - dealt with the car fire.
"Please allow extra time if travelling in the area," an earlier National Highways statement read.
All lanes on the A11 reopened by 3pm.
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