South Africa's corn stockpiles fell 45 percent, to 3.33 million metric tons, in December 2011, according to the South African Grain Information Service.

The country had 2.24 million metric tons of white corn and 1.09 million metric tons of yellow corn in stock, according to the agency. Barley, canola, oat, soybean and sunflower seed stocks were up compared to 2010 numbers, while groundnut and sorghum were down. Wheat stocks rose 35 percent, to 1.8 million metric tons.