Janelle Whitley, Policy Manager, Canadian Canola Growers Association (CCGA), Winnipeg MB discusses contracting grain from the farmers' perspective. Here is the link to the Practical Guide to Grain Contracts.
http://www.ccga.ca/PolicyDevelopment/Documents/A%20Practical%20Guide%20to%20Navigate%20Grain%20Contracts%20-%20Jan%202016%20Web.pdf