The National Farmers Union says a recent report suggests the Canada-European Free Trade Deal will impede the implementation of agricultural policy that's in the public interest.
The report was put together by a dozen social justice and environmental groups in Canada and Europe.
It suggests part of CETA could be used to force federal or provincial governments to financially compensate investors or corporations for profits lost if policies reduce market opportunities for the companies involved.
The NFU's Anne Slater says that could prevent government from taking action such as limiting the use of insecticides, mitigating climate change or supporting local food initiatives.
CETA could also see a farmer using his or her farm-saved seed have their assets seized or frozen for alleged intellectual property right infringement before the case goes to the courts.
The NFU's Terry Boehm says giving a foreign investor the possibility to lock up assets of a Canadian farmer is absurd.
NFU President Jan Slomp calls the Canada, European Union deal a bill of rights for corporations.
