The 'No Maiz Gringo' campaign is putting pressure on Mexico's government to restrict imports of corn from the U.S.
The U.S. produce became cheap and plentiful in Mexico, hurting millions of farmers and leading some to cross the border.
Corn farmer Keith Alverson says he and his peers are cautiously optimistic.
Midwestern farmers are spreading a tough weed by sowing ground-cover mixes contaminated with its seeds.
Low wheat, corn and soybean prices mean another bad year for many Midwest farmers.
The country will push to commercialize genetically modified corn and soybeans.
For crops where GMO seeds are big, they're 90 percent of the market