Held at the showground for three days, the show and sale has more than 700 merino sheep from across NSW to take part in one of Dubbo's longest running events.

The Australian Wool Network (AWN) open fleece show was also held yesterday, judged by brothers Maurie and Pat McNeill from the AWN.

Mr Maurie McNeill said this years competition had a record breaking 191 entrants.

"Forty-two of those entrants have come from Queensland," he said.

"Which is great considering they are in drought and doing it tough up there."

One of the show judges, Rod Kent from Kurrajong Park Merino Stud, Delungra, NSW said he was looking forward to the seeing the quality on offer.

"Judges will be looking for quality, size and soundness," he said.

Yanco Agricultural High School won first place in the Projection Class in the Annual School Wether Challenge, beating out nine other schools across the region.

They were judged on the highest estimated earning capability across a five year period from both meat and wool.

Yanco agriculture and primary industries teacher, Ellie Quinn said the kids had a great time.

"It was a great experience for the kids," she said.

"They put in a lot of time and effort, so it was a good result."

Tonight the 2014 Australian Supreme Merino Ram will be determined, by one judge, Mr Michael Gough coming all the way from Argentina to take part in the prestigious competition.