Soybeans tumbled for the fifth consecutive session on concerns of reduced demand as the dollar regains.
The dollar gained 0.7 percent against other currencies.
Soybean futures for July delivery declined to 0.8 percent or 10.5 cents to $12.87 a bushel on the Chicago Board of Trade.
Soybean prices have declined by 19 percent since posting the highest gain of $15.8625 on March 3 as South America harvests hit a record.
Soybean declines were also attributed to a speculation that Argentine farmers and the government were to begin negotiations to resolve a dispute over agricultural policies that led to road blockades, slowing exports.
Other commodities also declined as the dollar gained.