Some solid harvest numbers. "USDA estimates Brazil's crop at 58.8 million metric tons or 2.16 billion bushels. Brazil's corn crop is forecast at 49.5 million metric tons or 1.95 billion bushels.
Argentina is also harvesting a record corn crop at 22 million metric tons, or 866 million bushels. The average corn yield is 7.72 tons/hectare or 123 bushels/acre.
Together, Brazil and Argentina will produce a 3.83 billion bushel soybean crop in 2007 vs. 3.18 billion bushels produced in the United States in 2006."
NASA reports "Record crops in Argentina"