I will try once more to answer your question. Hopefully, someone will come to my rescue.
In the multilateral negotiations at the WTO in Geneva, Canada, like most countries in the world, places the highest priority on the reduction of agricultural subsidies because of the major implications they have on everyone. They distort markets. They also have very negative consequences on the poorest member countries of the WTO. In that sense, Canada is aware of the matter in its negotiating positions.
In bilateral negotiations, I don't think the implications for speculation are as significant, for one thing. For another, certainly no mechanism exists, at least to my knowledge, for tackling the matter directly.