Offers in the CIF and FOB markets also were unchanged.

Demand from livestock and poultry producers was steady, a dealer in the Kansas City market said.

Limited supplies of soymeal underpinned basis levels.

The tightness was expected to linger until soybean harvest begins, a mid-South rail broker said.

The US soybean crush dropped by more than expected in June to the lowest level in 21 months, according to National Oilseed Processors Association (NOPA) data released on Monday.

At 11:00 a.m. CDT (1600 GMT), Chicago Board of Trade August soymeal futures were up $1.30 at $309.70 a ton.