Fire services were called to straw and stubble on fire in Obthorpe Lane in Thurlby at about 10.45am yesterday (Tuesday).
A crew from Market Deeping attended the fire.
The blaze was caused by carelessly discarded smoking materials.
And at 4.20pm a crew from Market Deeping and Stamford were called out at to a combine harvester on fire in Baston Road in Greatford.
The fire was extinguished using one hose reel.