South African corn futures have gone up two days in a row on concerns that lack of rain will affect the crop in one of the country's main growing regions, according to reports.

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Yellow corn for delivery in July rose 0.3 percent to 2,098 rand (US$232) per metric ton by the close of January 29 on the South African Futures Exchange in Johannesburg. The white variety increased 0.1 percent to 2,188 rand (US$242) per metric ton. South Africa is the continent's largest producer of corn.