Corn futures traded in South Africa rose for a fifth day as the rand slid further, increasing the cost for imports of the grain.
White corn for delivery in December, the most active contract, added 0.2 percent to R2,349 a metric ton by the close on the South African Futures Exchange in Johannesburg.
The streak of gains is the contract's longest since May 31. Yellow corn for the same delivery month climbed 20 cents to R2,199.20 a ton.
The rand reached a six-week low against the dollar before the release of minutes of the Federal Reserve's July policy meeting. They may give indications of when the central bank will begin slowing monthly bond purchases aimed at fueling economic growth in the U.S.
"The rand's weakness made prices high," Lindy van Blommestein, a trader at Farmwise Grains (Pty) Ltd., said by phone in Johannesburg.
Wheat for delivery in December gained 0.2 percent to R3,355 a ton, advancing for a fourth session. -Bloomberg