Fire crews were called to 200 metres of straw bales alight off Cissbury Avenue, Peacehaven, yesterday (Monday September 1) afternoon.
Crews from Newhaven and Seaford were called at 3.30pm.
They used two specialist four-by-four vehicles to help tackle the fire.
Local farm machinery and beaters were also used.
Firefighters spent time damping down and turning over to ensure the fire was out, leaving the scene around 7.15pm.