Choppy trade expected. Good domestic demand, slow harvest underpins the market but weak exports add pressure.Weekly corn export sales were 548,500 tonnes, near the low end of market forecasts that ranged from 500,000 tonnes to 900,000 tonnes. Benchmark CBOT March corn futures failed to hold support above its 10-day moving average during the overnight trading session. There were 129 deliveries against CBOT's December corn contract, bringing the total for the period to 258.CBOT March corn last traded up 1 cent at $3.82-1/4 per bushel