A foul smell hung over areas of Great Yarmouth at the start of the week.
Hundreds of people took to social media to speculate over the cause of the pong.
Schoolchildren were seen holding their noses, people were forced to keep their windows shut and a grandmother said the odour made her young grandson vomit.
MORE: What's that smell in Great Yarmouth?A spokesman for Great Yarmouth Borough Council said he believed the smell came from a farmer's field.
He added: 'Environmental Services are confident that the odour this week was caused by fertiliser of some sort, smelling very much like silage created anaerobically from the breakdown of organic matter.
'It is thought that a farmer somewhere in the district is preparing their fields for winter crops with a liquid fertiliser. As long as good practice has been observed, the effects will ease as the matter is broken down naturally by bacteria in the soil.'
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