Two hundred tonnes of straw went up in flames after being deliberately set alight by arsonists.
At 5.45am yesterday (Thursday), a fire crew from March was called to Dykemoor Drove in Doddington.
They contained the fire and established a fire break to stop it spreading any further.
The cause of the fire was deliberate. Anyone with information should contact the police on 101 or the independent charity Crimestoppers anonymously on 0800 555111.