One thousand straw bales were completely destroyed after they were deliberately set on fire
The straw was set alight in a field off Hannington Road, Holcott.
The incident happened sometime between 10pm and 11.15pm on Friday, February 12.
Anyone with information can contact Northamptonshire police on 101. Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111.