Hundreds of Quebec grain farmers marched through Montreal streets Monday alongside a convoy of tractors to dump piles of corn at the steps of Prime Minister Justin Trudeau's riding office, calling for immediate action from the federal government to resolve the week-long strike at CN Rail. The strike has nearly halted shipments of propane, which is used to dry grain and heat barns and greenhouses. Ottawa has continued to urge a negotiated settlement rather than reconvening Parliament ahead of schedule for back-to-work legislation, as some industries and provincial ministers have demanded.