Swiss commodities behemoth Glencore International plc announced in March that it had a $6.1 billion agreement to acquire Viterra Inc., Canada’s largest grain broker.

The highly anticipated deal comes just six months before the end of the Canadian Wheat Board’s monopoly on export sales of grains. (In August, for the first time in nearly seven decades, Canadian farmers will be able to negotiate their own deals for selling their wheat and barley crops.)