Another massive wave of crops coming to market in the U.S., Canada and Europe will support strong U.S. grain exports in the months ahead, according to the top executive of commodities trader Bunge Ltd.

Generally benevolent weather so far for the North American growing season is on pace to yield a record combined corn and soybean crop in the U.S., according to Bunge Chief Executive Soren Schroder, and boost momentum for Northern Hemisphere grain shipments after South American crops ran into weather-related problems this year.

Bunge still sees overcapacity in its North American network of grain-shipping facilities, however, and has closed 12 facilities since the beginning of 2015 in an effort to boost overall efficiency.

“Outside of this next window for U.S. exports, it’s all about being lean and mean,” Mr. Schroder said in an interview.

Bunge, which ranks among the world’s top traders and processors of agricultural commodities, aims to boost earnings in its core agribusiness segment as it copes with a string of bumper crops that have pushed down grain prices globally and limited opportunities to profit from shifting markets.