Chicago Board of Trade (CBOT) soyabean futures eased on Tuesday, pressured by an advancing US harvest and improved planting weather in South America, traders said.

CBOT November soyabeans were 4 cents lower at $9.21-3/4 per bushel while January soyabeans, the most actively traded contract, closed down 3-3/4 cents at $9.34-1/4 a bushel.

CBOT December soyameal ended up 30 cents at $302.70 per short ton, while December soyaoil shed 0.30 cent to settle at 31.57 cents per pound.

Largely dry US Midwest weather is allowing farmers to continue harvesting soyabeans in much of the region. Below-normal precipitation is expected over the next week.

The US Department of Agriculture (USDA) said 75% of soyabeans were harvested as of Sunday, in line with trade expectations.

Rains in parts of Brazil and Argentina have lessened concerns about early-season dryness as farmers there ramp up planting.

Grain traders are adjusting positions ahead of the USDA's monthly supply/demand reports on Friday and awaiting news about a US-China trade deal.

China is pushing US President Donald Trump to remove more tariffs imposed in September as part of a "phase one" US-China trade deal, people familiar with the negotiations said on Monday.