White farmers in South Africa are trying to flog their land as fears grow that the government is about to start a widespread campaign of seizures.

Union bosses say a record number of properties are for sale but nobody is buying, making the properties effectively worthless.

Agri SA union, which represents mainly white commercial farmers, has warned that such seizures will deter investment, cause job losses, and may rob South Africa of the ability to feed itself.

Meanwhile two farms in the north of the country have reportedly become the first targets for seizures after talks between the government and owners about buying the land broke down.

A record number of white South Africa farmers are attempting to sell off their land but nobody is buying amid fears that the government is poised to start a widespread campaign of seizures

Cyril Ramaphosa, who took over the ANC from Jacob Zuma last year, has committed his party to redistributing land from whites to blacks. ANC chair Gwede Mantashe (right) has suggested that anybody who owns more than 25,000 acres is a target

Akkerland Boerdery, the owners of two game reserves in Limpopo, told City Press that the government asked to buy their land but was only willing to offer a tenth of the price.

When the offer was refused, ministers allegedly sent a letter which said: 'Notice is hereby given that a terrain inspection will be held on the farms on April 5 2018 at 10am in order to conduct an audit of the assets and a handover of the farm's keys to the state.'

AgriSA union spokeswoman Annelize Crosby told the paper: 'What makes the Akkerland case unique is that they apparently were not given the opportunity to first dispute the claim in court, as the law requires.'

If the land is seized it will be the first time that the South African government has refused to pay market value for land.

Since the end of apartheid in 1994, the ANC has followed a 'willing seller, willing buyer' process to redistribute white-owned farms to blacks.

But according to a government audit last year, 72 per cent of farmland in South Africa is still owned by whites, despite them making up 9 per cent of the population.

That statistic prompted Cyril Ramaphosa, South Africa's president who succeeded Jacob Zuma last year, to commit to a program of land expropriation.

His ANC party has promised to 'test out' section 25 of the constitution, which allows the government to seize land to re-balance past 'racially discriminatory laws'.

The constitution makes it clear that reasonable compensation must be offered to the owner of the land, but the ANC is now planning a number of test cases to see if land can be seized without money changing hands if it is 'in the public interest'.

Two game reserves in the north of the country (location pictured) say they are the first to be targeted for seizures after government talks to buy the land for a tenth of its value broke down

Union bosses warn that land seizures will deter investment, cause job losses, and may rob South Africa of the ability to feed itself

If such bids fail, the ANC has threatened to amend the constitution.

A program of land seizures in nearby Zimbabwe in the 1990s sent the country into an economic spiral from which it has never fully recovered.

Reports earlier this month suggested ministers have already drawn up a list of 139 South African farms to be targeted, though the government denies the existence of any such list.

Omri van Zyl, head of the Agri SA union, which represents mainly white commercial farmers, told The Express: 'The mood among our members is very solemn.

'They are confused about the lack of any apparent strategy from the government and many are panicking.

'So many farms are up for sale, more than we've ever had, but no one is buying.'

ANC chairman Gwede Mantashe sparked more panic last week when he suggested that anyone owning more than 25,000 acres would be targeted.

Agri SA said about 20 per cent of South Africa's farms produce 80 per cent of the food, and many of those properties would be affected by the cap.

There are fears that the release of the list of 139 farms to be seized has already made the land worthless.

Cattle farmer Jo-an Engelbrecht told the ABC's Foreign Correspondent his farm just outside Johannesburg was now 'worth zero'.

'We had several auctions in the last two or three weeks cancelled because there was no people interested in buying the land,' he said.

'Why would you buy a farm to know the government's going to take it?'