CHICAGO, July 25 (Reuters) - Chicago Board of Trade corn futures eased on Friday amid expectations of a large U.S. harvest, and weather forecasts that could benefit Midwestern crop production yields, market analysts said.
New-crop CBOT December CZ25 ended the day down 1-3/4 cents at $4.19 a bushel. The most-active corn contract Cv1 posted a nearly 2.05% loss for the week.
Brisk export demand underpinned the market. The U.S. Department of Agriculture on Friday confirmed private sales of 140,000 metric tons of U.S. new-crop corn to South Korea and another 102,870 tons to Mexico.
Corn futures faced pressure from weather forecasts calling for milder nighttime temperatures in the Midwest in August, which can be beneficial to the plants during the crucial grain-fill period, traders said.
Traders said they were trying to position ahead of the Trump administration's August 1 tariff deadline, but were hesitant to make big shifts in their trading models as U.S. talks are progressing with several top export markets.
The European Union and the United States could reach a framework deal on trade this weekend, ending months of uncertainty for European industry, EU officials and diplomats said.
China's agriculture ministry said high temperatures and drought may persist in some parts of the country and have adverse impacts on autumn grain production.
Russia effectively cut export duty for barley and corn through adjusting the calculation mechanism in order to boost its exports.
Basis bids for corn were mostly steady to weaker in the U.S. Midwest, softening at a few corn ethanol plants, spot checks showed.