European Union has raised its import tariffs on maize to 10.95 euros ($13.01) per tonne from 5.16 euros previously. EU had set the previous tariff in August, ending a near three-year period of duty-free imports for the cereals, in response to a sharp fall in international prices linked to swelling global supplies. A rally in the eur exchange rate amplified a weakness in U.S. prices used by the EU to determine whether a tariff is needed. The 28-country bloc imports millions of tonnes of maize (corn) each year to meet demand for livestock feed. Ukraine has been the its main supplier in recent years. It also imports maize from other eastern European countries and from North and South America.