Some farmers in Western Canada want the Canadian Wheat Board to return with a monopoly over exports of wheat and barley.
A group from parts of Manitoba and Saskatchewan called the Canadian Wheat Board Alliance says the former Conservative government made a mistake when it privatized the board and sold it to the G3 Global Grain Group.
Kyle Korneychuk, an alliance spokesman, says the privatization has cost farmers money and thousands of people their jobs.
Manitoba Agriculture Minister Ron Kostyshyn says he is very concerned about the financial situation of farmers since the loss of the wheat board.
Alliance members also wonder what will happen to the Port of Churchill in northern Manitoba when short-term federal subsidies end next year, reports Canadian Press.
Korneychuk said the wheat board did a good job of co-ordinating the movement of grain from farms via rail to port, then overseas markets.
"It allowed us to return almost the full value of the world price to farmers," he said.
"Farmers only paid for the CWB's operating expenses but now they pay for the private trade's operating expenses and the profits to foreign shareholders and grain company owners."
The federal government announced in April 2015 that G3, which is partly owned by Saudi Arabia, would buy 50.1 per cent of the board for $250 million.
It said the rest would be kept in trust for grain farmers.