A world record has apparently been broken in central western New South Wales, where a group of farmers converted wheat into bread in under 17 minutes.

Hundreds watched on as the world record was broken in a paddock in Parkes.

The group of farmers harvested the wheat, turned it into flour, made dough and then cooked a baker's dozen - all in just 16 minutes and 30 seconds.

The previous world record, set by a group in the United Kingdom, was 18 minutes and 11 seconds.

The group beat the record during a trial run but improved on their time in the official attempt.

Organiser Neil Unger says he cannot believe they did it.

"It's a huge relief," he said.

"Last night we didn't think we had a hope in hell.

"We were here till nearly, I'd say what nine, 10 o'clock, went home in disgust and said, 'you know something is going to have to change'.

"This morning, I just can't believe how much quicker everything went."

Nationals Leader Warren Truss, who acted as an adjudicator, says it is an example of the strength of Australian farmers.

"It was easy, they smashed the record," he said.

"They were way ahead of what anyone else in the world has been able to do, and what's more, I think they've got it within their capabilities to break it again next year.

"It's certainly an example of wonderful productivity in the farm."

The result has to be verified before it is officially accepted by the Guinness Book of Records.