Corn fell more than 3% Friday on liquidation ahead of historic elections in Greece over the weekend that unsettled global markets, contributing to risk-aversion. July soybeans were down 10 cents per bushel at $13.76. July corn was down 22 cents at $5.79-1/2. And new-crop December was down 10 cents at $5.06. CBOT wheat for July delivery was down 14 cents at $6.09-1/2. "With this Greek election coming up Sunday, a lot of people are leery about