Sign up to play “MarketMaxx,” the Corn And Soybean Digest fantasy grain game. It's easy, fun and you'll learn more about marketing. Sign up by logging on to and registering at the top left. You can then begin trading your fictitious 100,000 bu. of corn and 50,000 bu. of soybeans.

Winners at the end of the game, Oct. 31, can take home the grand prize of a year's use of a Massey Ferguson tractor or combine. Also available are such prizes as a computer system from Syngenta Crop Protection, customized rugged mobile computers from Grayhill Custom Mobile Solutions or a high-speed satellite Internet service from Agristar Global Networks.