LONDON - Chicago corn futures were lower on Monday, with concerns about weak demand adding to pressure from recent dollar strength, while soybean and wheat prices also fell.

The market was also focussed on the trade conflict between the United States and China, with comments by U.S. President Donald Trump over the weekend raising doubts about whether there had been any agreement to lift tariffs.

The U.S. dollar remained near multi-week highs on Monday as the market waited for more clarity on U.S.-China tariffs.

The most-active corn contract on the Chicago Board Of Trade Cv1 was down 0.7% at $3.74-1/2 a bushel by 1142 GMT.

"A stronger dollar and poor demand for U.S. supplies are weighing on corn and beans," said Phin Ziebell, agribusiness economist at National Australia Bank.

The uncertainty surrounding an interim U.S.-China trade agreement also poses a risk to prices, he added.

Officials from both countries said on Thursday that China and the United States had agreed to roll back tariffs already in place on each others' goods in a "phase one" trade deal to end a damaging trade war.

U.S. President Donald Trump said on Saturday however that there had been incorrect reporting about U.S. willingness to lift tariffs, although talks were moving along "very nicely".

"The U.S. President continued to muddy waters over the weekend. What seemed clear on Friday morning, some degree of tariff rollback, is now less certain," Commonwealth Bank of Australia analyst Tobin Gorey said.

However, prices were lent some support by the U.S. Department of Agriculture's (USDA) move to lower its corn harvest outlook on Friday to 13.661 billion bushels from 13.779 billion a month earlier.

The outlook was based on an average yield of 167.0 bushels per acre (bpa), down from 168.4 previously.

CBOT's most active soybean contract Sv1 was down 0.5% at $9.26 a bushel.

The USDA put the U.S. soybean crop at 3.550 billion bushels, with yields seen at 46.9 bpa, unchanged from October.

CBOT's most active wheat contract Wv1 fell 0.8% to $5.06-1/2 a bushel, while December wheat on Paris-based Euronext BL2Z9 was down 0.6% to 177.50 euros a tonne.

Dealers noted the USDA on Friday upwardly revised its forecasts for wheat crops in the European Union and Russia, although the impact was largely offset by cuts for the United States, Argentina and Australia.

(Additional reporting by Naveen Thukral in Singapore; Editing by Aditya Soni and Jan Harvey) ((nigel.hunt@thomsonreuters.com; +44 20 7542 8421; Reuters Messaging: nigel.hunt.thomsonreuters.com@reuters.net))