The NSW Farmers' Association will urge the consumer watchdog to "lift the veil" on the impact of $1 per litre milk as well as pricing mechanisms and contract terms.

Dubbo-based association dairy committee chairwoman Erika Chesworth said the organisation would be at the Australian Competition and Consumer Commission’s (ACCC) public forum at Taree on Tuesday to provide real examples of issues.

"Farmers can feel powerless against the big companies but this is our chance to raise our concerns," Ms Chesworth said in a statement on Monday.

"Even measures that are supposed to even out the playing field, like collective bargaining groups, need to be critically analysed and improved."

The ACCC industry-wide inquiry was initiated late last year and will look into competitiveness, trading practices, and transparency.

Earlier in 2016 the country's biggest dairy producers, Murray Goulburn and New Zealand-based Fonterra, announced retrospective cuts to the price they pay farmers partly prompted by major supermarkets selling milk at $1 a litre.

Ms Chesworth has advocated following overseas examples.

"In other countries, such as Ireland, measures including annual retrospective price reporting takes the mystery out of the supply chain and improves the business relationship between companies and farmers," she said.

“The commission has the power to unlock the entire supply chain, identify the elements that aren’t working, and help set the industry back on a sustainable path to ensure there is a fresh domestic milk market and profitable export options into the future.”

Farmers who are unable to attend the forum can still have their say by contacting the ACCC dairy inquiry team on (03) 9290 1997 or dairyinquiry@accc.gov.au.

The association has made a written submission to the inquiry, and will be continuing to engage with the ACCC leading up to the final report being handed down in late 2017.