Corn futures at the Chicago Board of Trade were slightly firmer on Wednesday on a mild recovery after dipping to a three-week low on Tuesday, traders said.
But corn was pulled off its highs by the weakness in the neighbouring soyabean pit, with old-crop months 10 to 24 cents lower.
CBOT corn futures were 1/2 cent to 1-3/4 cents per bushel higher by 11 am CDT (1600 GMT). July corn was up 1-1/4 at $2.81-1/2 and new-crop December 1-1/2 higher at $2.85-3/4.
Early players included Cargill Investor Services buying 300 December. O'Connor and Co bought 500 December and sold 1,000 July, traders said.
The nine-day relative strength index for December corn was hovering at 33 on Wednesday, just above the benchmark 30 level that chartists view as technically oversold.
At Tuesday's close the nine-day RSI fell to 28. CBOT oat futures were about a penny higher, following corn. July was up 1 at $1.45-3/4 per bushel.