March wheat slid 7 cents, or 1.3%, to $5.27 3/4 a bushel.Corn and soybean prices also suffered a correction, largely erasing gains posted on Tuesday, as the markets took into account a strong dollar, an uptick in farmer selling and profit taking ahead of a closely watched USDA conference commencing on Thursday. Analysts said increased movement of grain in both the U.S. and South America weighed on prices for the crops, as did selling by bearish traders and investors.