“March corn futures posted a weak technical close, failing to push through the key 200-day moving average and finishing at the bottom of the session range. The weak close could leave the market vulnerable to additional selling pressure heading into Wednesday’s trade. South American weather remains mostly favorable for this season’s corn and soybean crops. Crop consultant Michael Cordonnier raised his forecast for the Argentina corn crop production estimate to 54 MMT, up 2MMT from his last estimate,” Doherty said.