Mr Day, who described himself as an ordinary farmer with a background in agronomy, explained his farm operated in the sometimes snow-covered Manitoba province.

Mr Day said more than 1 million ha of GM crops were grown in Manitoba, of which about 60 per cent was Liberty Link.

About 99.5 per cent of the crops grown in his home province of Manitoba had genetically modified traits and only half a per cent were conventional.

He said conventional canola was 100 per cent of the canola crop in 1995.

The major United States crop-growing state of North Dakota, immediately south of Manitoba, had virtually abandoned conventional canola, with very little grown since 2005.

Japan has been a steady buyer of Canada's GM canola, with about 3.5 million tonnes sold to Asia in 2006-07 and 670 000 tonnes to the US.

Canada is also shipping about 150 000 tonnes of canola oil to Europe.

Mr Day's farm also grows premium grade wheat for the European market, grown on GM canola stubble.

"They know about it and they don't care about it."

Mr Day said the food production issues were now swinging towards carbon footprint and the impact on climate change.

"My GM canola with half a litre of glyphosate or half a litre of Liberty, zero till, onepass seeding is going to be a pretty low carbon footprint," he said.

Mr Day said there was a growing demand for canola, which was the best oil for biodiesel, and there weren't any questions over whether it was GM or not.

He said he had not experienced any problems with wildlife on his farm in recent years, such as wild animals like moose and cougars intruding onto his property.

Mr Day said he had no political axe to grind.

"We make decisions on our farm based entirely on what is best for our family.

"I'm not writing a book, I don't have a website, I'm not representing a political group; I'm just giving you my perspective.

"We're making those decisions because that's what's best for our farms, for our families."

Lawyer Mark Lunney outlined the civil law and contracts that could create potential liabilities for farmers.

For a video interview with Mr Day go to: www.country

news.com.au