Wheat futures have staged a significant rally since the February WASDE, which farmers have used to sell more wheat. The trouble across the northern Plains is that transportation is still a big problem, and farmer selling doesn't necessarily close the gap to mills and exporters. General Comments Markets were lightly traded and slightly lower overnight ahead of this morning's USDA Outlook Conference projections for 2014/15. It was also Friday as the recent rally in wheat, corn and soybean markets brought increased producer selling. Trading volume today was average or below average. The weekly export sales report didn't hold any surprises except that no additional cancellations of soybean sales to China were noted. Together with a good soyme...