Fire crews were called out to a field off Lubenham Road on the outskirts of East Farndon just after 10pm.
“A large quantity of fly-tipped waste, which included plastic netting, was on fire with crews using a hose reel jet and soil to extinguish the flames,” said Northamptonshire Fire and Rescue Service.
“The fire is believed to have started accidentally and crews left the scene at 11.28pm.”