Farmers and their representatives are furious the banking royal commission has set aside fewer than five days to deal with issues in agricultural finance.

National Farmer's Federation president Fiona Simson said the amount of time allocated was "unacceptable" given the complex issues in regional communities.

Fiona Simson said the amount of time allocated was "unacceptable". ( Supplied: National Farmers Federation )

"It's unacceptable if there's not enough time being allocated to hear some of these stories and to make sure that people have the opportunity to talk to the royal commission," she said.

"As a community, we would expect that enough time be allocated and if it's not been allocated — and clearly we need more — then that's what the royal commission must do."

National Party member John "Wacka" Williams, who has long campaigned for customers who believe they are victims of the banks, said the amount of time was concerning.

John "Wacka" Williams has long campaigned for customers who believe they are victims of banks. ( Four Corners )

"The whole process has not been long enough," he said.

"My attitude is this: do it once, do it properly.

"Nothing would be worse than to see that it was rushed and they could have done a better job."

The fury and dismay of farming communities about bank behaviour — particularly in relation to the forced sales of farms — pushed members of the National Party to defy their Coalition partners in the Liberal Party and back calls for a royal commission.

The next hearings begin in Brisbane on Monday, June 25.

There will be fewer than five days to investigate farming finance.

A proportion of the first day of each new hearing is devoted to detailing responses from organisations questioned in the previous hearing.

Further time is spent reading out the "homework" from institutions who have representatives set to appear in the witness box in the coming hearing.

Generally, each institution is asked to outline any misconduct or conduct falling below community standards in the past 10 years, in a document no longer than 50 pages.

The commission will also spend an unspecified period of the fortnight's hearings on natural disaster insurance.

'It's not enough'

The truncated period means the royal commission will not hear from people like Bill Mott.

Five years ago, he was working a farm estate, valued at $22 million, with his wife and five children.

Today, the 61-year-old is divorced, has a strained relationship with some of his children and has no home to his name.

Bill Mott said he felt let down by the royal commission. ( ABC News: Danielle Bonica )

Mr Mott said, after initially being hopeful about the commission, he felt let down.

"It's not enough. They're not going to scrape the surface," he said.

"It's very, very disappointing to think that they've had that number of submissions and that's the best time they can offer, because there's real pain.

"And I don't see how they are going to get to the bottom of the real problems in that short amount of time."

Mr Mott alleges mismanagement and fraud at his bank, NAB, forced him to default on a payment.

The farms were sold for $7 million.

NAB denies the allegations.

The inquiry into banking has heard from just 16 members of the public so far, covering the same number of topics.

There have been 6,761 public submissions to the commission.

By contrast, the Royal Commission into Institutional Responses to Child Sexual Abuse — on a very different issue — held more than 8,000 private sessions with victims, as well as operating a helpline and a message service.