Many parts of America long considered the bread basket of the world are now facing an unprecedented phenomenon of food rationing. Major retailors in New York,New England and the west coast are limiting purchases of flour,rice and cooking oil as demand exceeds supply.There are also reports of hoarding by the consumers.Spiking food prices have led to riots in recent weeks in Haiti,Indonesia and several African nations.India also banned export of all but the highest quality of rice.There have been many stories about the worldwide shortages that it encourages people to stock up.