Brussels, 04/01/2008 (Agence Europe) - To avert potential shortages and price hikes on their domestic markets, China, Russia and Argentina have decided to restrict or ban wheat exports, leaving the United States and the EU competing with each other. Argentina, the world's sixth biggest global exporters of wheat with production estimated at 15.4 million tonnes in 2007/2008, 10 million tonnes of which has been exported since the beginning of the marketing year, has decided to ban wheat...