Wheat lost more ground as prices eased from multi-month highs struck earlier in the week, although losses were limited by expectations of drought-affected US yields and dry weather risks in other major exporting countries.
Corn was almost unchanged.
The most-active Chicago Board Of Trade soybean contract was up half a cent at $10.43-1/2 a bushel as of 1130 GMT. Earlier in the session, it dropped to $10.37-1/2 a bushel, the lowest since April 27.
Soybeans fell on Wednesday as comments by the chief executive of international trading house Bunge, on a halt in US soybean sales to China, fuelled concern about the impact of trade tensions between the world's two largest economies.
Traders are awaiting weekly US export figures at 1230 GMT for a further indication of the extent of slowing Chinese demand for US beans.
"Soybean prices are likely to remain under pressure as Chinese buyers are taking Brazilian beans," said Phin Ziebell, agribusiness economist at National Australia Bank.
"It is because of seasonal reasons as well as due to the trade spat between the US and China."
A top-level US trade delegation visiting China this week is not expected to reach a comprehensive deal, but US President Donald Trump made positive comments about his Chinese counterpart Xi Jinping as the delegation arrived on Thursday.
A poor crop in Argentina continued to underpin soybean markets, with heavy rain hampering harvest work after earlier drought slashed yield potential.
CBOT wheat lost 1.0 percent to $5.21-1/2 a bushel, while corn ticked down a quarter of a cent to 4.04-3/4 a bushel.
The wheat market was consolidating after rallying on flagging harvest expectations for drought-hit US winter wheat, along with concerns over dry conditions in other major producing zones like Australia, Canada and the Black Sea region.
"Worsening growing conditions in the Southern Plains continue to lower US winter wheat yields," Thomson Reuters Agriculture Research analysts said in a note.
But warm, dry weather should allow delayed spring wheat plantings to be completed before an insurance cut-off date of May 15 in southern Minnesota and northern South Dakota, they added.
Corn investors have also been weighing a slow start to US planting and dry weather threatening yields in Brazil's second crop.