Firefighters battle large SA shed fire

A shed containing chemicals and explosives is on fire at a vineyard in South Australia's Riverlands.

Firefighters are battling to defend the blaze at the large shed at Taylorville, which contains tractors, specialist trailers, other vehicles and a boat.

It also contains a range of unknown agricultural chemicals and other material which could cause explosions, the Country Fire Service says.

Eight crews are working to stop the fire from spreading to a nearby house and vineyards.