CHICAGO, Aug 20 (Reuters) - Chicago Board of Trade corn futures chopped up and down but ended higher on Wednesday as traders monitored results from a U.S. Midwest field tour that has initially confirmed strong yield prospects, traders said.
Second-day results from the closely watched Pro Farmer crop tour on Tuesday showed Indiana corn yield potential at a 22-year high. Nebraska recorded the best corn yield outlook in four years.
The annual tour, which continues until Thursday, is widely followed by the grain market and particularly scrutinized this year after the U.S. Department of Agriculture issued a much bigger than expected projection of the 2025 corn crop.
Traders are awaiting further reports from day 3 of the tour, with scouts surveying fields in Illinois and western Iowa.
The editors of Pro Farmer, a newsletter, will release their own estimate of U.S. corn and soybean production on Friday.
CBOT December corn futures CZ25 ended 3/4 cent higher at $4.04 per bushel.