CBOT July soft red winter wheat was last 5-1/4 cents lower at $6.51-1/4 per bushel. K.C. July hard red winter wheat was last down 3-1/4 cents at $6.01-1/4 per bushel. MGEX July spring wheat was last 1-1/4 cents lower at $6.81-1/2 per bushel.
The US Agriculture Department reported totaled wheat export sales for the week ended April 22 at 461,300 tonnes. Analysts' forecasts ranged from 200,000 to 750,000 tonnes.
Corn export sales totaled 1.075 million tonnes in the week ended April 22, USDA said. That was in line with analysts' forecasts that ranged from 500,000 tonnes to 1.6 million tonnes.
The Four Turandot vessel chartered by the United States is scheduled to arrive on Wednesday at the port of Barcarena in the north of Brazil, and is expected to sail on May 9, the Cargonave ship line-up data shows.
Brazil, the world's largest soy producer and exporter, very seldom sells to the United States. China is the main buyer of its soy.
Two 4,000 tonnes consignments were both purchased at $724 a tonne c& from trading house CJ International, traders said. A further 4,000 tonnes were purchased from another trading house at $733.60 a tonne c&f.
The soybean harvest for the current campaign is expected to be around 44 million tonnes, according to the Buenos Aires grains exchange, hit by late-season drought.
Sales of wheat have hit 11.33 million tonnes, almost a third less versus last season's pace, the ministry said. The government estimates the 2020/21 wheat harvest at 17.6 million tonnes.