The Federal Government appears to be walking away from its Water for Fodder scheme.

Prime Minister Scott Morrison and former water minister David Littleproud announced the $100 million drought relief package last November.

The plan was for the Commonwealth to provide $100 million to South Australia to increase production at its Adelaide desalination plant.

This was intended to free up 100GL of water upstream to be sold at a heavily reduced rate to farmers to grow crops for fodder.

“There'll be 100GL of water delivered by April 30 and we will repay that through the use of the desalination plant,” Mr Littleproud said at the time.

Just 40GL has been delivered so far, and the government is refusing to answer questions on when the remaining 60GL might be made available.

It is also unclear how much of the $100 million the South Australian Government has received.

A review of the scheme earlier this year warned; “South Australia does not have sufficient water security to enable round two of the Water for Fodder program to proceed as planned at this time”.

“[But] as the water year progresses and water availability changes, circumstances may become apparent that enable the Water for Fodder program to run either in full or split across water years.”

The first round of the Water for Fodder program was heavily oversubscribed, leaving many farmers with no access to the subsidised water, and others gaining access too late to be of practical assistance.

Mr Pitt says he is waiting to see how winter flows through the system affect South Australia's water supply.