Wheat rises as La Nina threatens harvest

Wheat crops in China, the world's biggest producer, and the US are threatened by continuing drought as La Nina persists, weather forecasters said. The countries will be the last to emerge from the dry weather linked to La Nina, a cooling of the Pacific Ocean, and the conditions may linger for two more months, said British Weather Services and Telvent DTN Inc. Wheat may average $8.50 a bushel in

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