Australian farmers signing up to grow genetically modified canola are exposing themselves to ”onerous” obligations, an international law expert says. Duncan Currie says the contract between biotechnolgy firm Monsanto and GM canola growers bars farmers from selling their land to anyone without a Monsanto licensing agreement. Monsanto described the claim as ”ridiculous”. The contract, obtained by The Canberra Times, shows that if the land is sold up to two years after the agreement expires, contractual obligations are passed to the buyer, who could be liable for the former owner’s contract breaches.