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* CBOT March corn settled 2 cents higher at $3.82 per bushel after holding chart support at its 20- and 50-day moving averages.
* US-China trade talks ended with negotiators focused on Beijing's pledge to buy "a substantial amount" of US products, including agricultural goods, the US Trade Representative's office said on Wednesday.
* Poor crop weather in South America, with hot and dry conditions in parts of Brazil and excessive rains in Argentina, also supported prices.