Police were called by firefighters to the large haystack on fire at a farm off Pinfold Lane at 9.44pm on Sunday.
The fire - believed to have been started deliberately - ravaged more than £400 worth of hay.
A spokesperson for Humberside Police said: "Not only has this incident tied up fire crews for a number of hours, but it has resulted in a financial impact to the landowner.
"We advise members of the public to stay away from haystacks - they are highly flammable and a discarded match or cigarette can easily start a fire with devastating consequences."
Anyone who has information that might help police with their investigation into the fire should call them on 101, quoting investigation number 16/98908/20 or log 627 20/09/20.
Information can also be passed on anonymously via Crimestoppers on 0800 555111.
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