Barnaby Joyce hasn't prepared a single report on the drought despite having been appointed the nation's special drought envoy more than a year ago.

Key points: Barnaby Joyce was the Federal Government's Special Drought Envoy until the May election

Barnaby Joyce was the Federal Government's Special Drought Envoy until the May election Senators wanted the Government to release any reports he'd written while in that role

Senators wanted the Government to release any reports he'd written while in that role While no report was written, Mr Joyce said he reported directly to the Prime Minister

The revelation was unearthed when Drought Minister David Littleproud wrote to Parliament to say the Government would not be making any reports by the special drought envoy public, because no such report exists.

"The request for the former special envoy for drought assistance and recovery's report cannot be complied with as he did not prepare a final report and as such, no document exists," Mr Littleproud wrote.

Prime Minister Scott Morrison appointed Mr Joyce special envoy for drought assistance and recovery in August last year, when he unveiled his first Cabinet line-up.

Mr Joyce lost his envoy title after May's federal election, with Mr Littleproud taking on expanded responsibilities for drought.

Mr Joyce has told the ABC he "reported directly to the Prime Minister on numerous occasions" and had raised concerns farmers had dealing with government departments and charities.

"Mr Joyce met with the Prime Minister a number of times to discuss his findings and he also presented these finding to the Cabinet," a spokesperson for Mr Morrison said.

Barnaby Joyce said he reported directly to Prime Minister Scott Morrison. ( ABC News: Matthew Roberts )

According to Mr Joyce's website, his role as special drought envoy was as an "advocate and adviser to the Prime Minister".

"His role was to report on the ground, from the regions, on how drought affected farmers and graziers and their communities, and how Federal Government drought relief policies were working and what improvements to help build resilience were needed," the website states.

Rural news in your inbox? Subscribe for the national headlines of the day.

Earlier this week, Labor senators issued a formal request for the Government to make public the final reports by the Drought Envoy, the Coordinator-General for Drought, Major General Stephen Day, and the Drought Interagency Taskforce.

In response, Mr Littleproud said Major General Day's final report remained confidential and was, "subject to the deliberations of Cabinet".

He said the Government might release it at a later date.

The Federal Government says Major General Stephen Day's drought report remains confidential. ( ABC News: Matt Roberts )

"The Australian Government is very concerned about the deteriorating drought conditions facing many farmers and communities around the country," Mr Littleproud wrote.

The Opposition's agriculture spokesman, Joel Fitzgibbon, described the appointment of Mr Joyce as a "slap in the face" to drought-affected communities.

"Now we find out that the special envoy has not written a report on his role," Mr Fitzgibbon said.

"The question is, what benefit did taxpayers receive as a result of the drought envoy's additional staff and travel resources they paid for? We now know the answer is none."

Mr Fitzgibbon again called on the Government to release Major General Day's final report.