Recent increases in open interest in corn, soybeans and wheat have suggested that new noncommercial shorts had entered the market. Today's sudden rally in response to the U.S. dollar's weakness apparently caused many of them to cover their short positions. General Comments Today was "Turnaround Tuesday," done with considerable style. Grain and soy joined in with numerous other commodities and surged higher. Word that the new Greek government was near an agreement with the European Central Bank (ECB) and eurozone lenders on handling its debt and austerity program sent the U.S. dollar tumbling lower. The U.S. Dollar Index fell sharply by more than 1 point. That in turn sparked strong rallies in copper, livestock and energy products as well...