Argentina is today the land of genetically modified or GM soya, which now makes up around half the country's farming exports.
Many Argentine farmers have made handsome profits by renting out their land to the big companies that grow GM crops.
Santiago Castillo has made enough to pay off his business debts and move to the city. But now he's wondering if the changes could spell trouble for farmers and the land. Gloria Beretervide visited him in San Pedro.