Grain and soy markets saw a dual between poor weekly export sales and growing weather concerns ahead of a three-day weekend. Corn futures prices did bounce around actively in a 10-cent trading range today. General Comments Please note: Grain markets are closed tomorrow for Good Friday, although most financial markets will remain open.Last week's export sales volumes for corn, soybeans and wheat were smaller than expected, and there were net cancellations of 212,700 MT of grain sorghum sales. Only soymeal sales held their own. Soybean export sales stood out with just 27,400 MT of sales for 2014/15 but 568,300 MT of sales for 2015/16. In addition, USDA announced a daily sale of 118,000 MT of soybeans for 2015/16. Wheat sales were only 162,1...