Wheat down 9-11 cents a bushel, corn down 2-4 cents, soy down 12-14 cents
The following are U.S. expectations for the resumption of grain and soy complex trading at the Chicago Board of Trade at 8:30 a.m. CDT (1330 GMT) on Tuesday.
WHEAT - Down 9 to 11 cents per bushel
Expectations for ample supplies from the Black Sea region and for an above-average Australian crop weighed on CBOT wheat futures.
Grain consultancy Sovecon said it raised its forecast for Russia's 2025-26 wheat exports.
Ukraine increased wheat exports to 1.89 million metric tons in August and may export at least 1.7 million tons in September, the country's largest farm producers union UAC said.
The U.S. Department of Agriculture is slated to issue an update on the U.S. spring wheat harvest in a weekly crop-progress report at 3 p.m. CDT (2000 GMT).
CBOT December soft red winter wheat (WZ25) was down 9-1/4 cents at $5.25 per bushel by 7:30 a.m. CDT (1230 GMT).
K.C. December hard red winter wheat (KWZ25) was down 9-1/4 cents at $5.10-1/2 per bushel. Minneapolis December wheat (MWEZ25) was down 9 cents at $5.71 a bushel after setting a contract low.
CORN - Down 2 to 4 cents per bushel
Corn futures weakened under pressure from projections for a record-large U.S. harvest.
Traders were monitoring risks for plant diseases to limit crop yields and for a potential frost in parts of the upper Midwest this week.
The USDA is due to update condition ratings for U.S. corn and soybean crops in its weekly progress report.
CBOT December corn (CU25) was 2-3/4 cents lower at $4.17-1/2 per bushel by 7:30 a.m. CDT (1230 GMT), after jumping to a one-month high on Friday.
SOYBEANS - Down 12 to 14 cents per bushel
A lack of Chinese demand for U.S. soybeans loomed over CBOT futures, as China has been buying from Brazil during Washington's trade dispute with Beijing.
The Korea Feed Association in South Korea purchased about 60,000 metric tons of soymeal expected to be sourced from South America in a private deal, European traders said.
In Ukraine, President Volodymyr Zelenskiy signed a law introducing a 10% export duty on soybeans and rapeseed, according to the Ukraine parliament's website.
CBOT November soybeans (SX25) were 13 cents lower at $10.41-1/2 per bushel by 7:25 a.m. CDT (1225 GMT).
