Firemen from Bourne were called to a blaze that tractor tyres located in an area near the town.
The blaze broke out at North Drove, Twenty, at about midnight on Wednesday and firemen used a hose reel to put out the flames.
Four large tractor tyres were damaged by the fire thought to have been caused by sparks from a grinder.
Meanwhile, a fire crew from Spalding used a hose reel to deal with a blaze involving a pile of paper in a Spalding Common bus shelter.
The fire was reported at about 10pm on Tuesday.