Brazil is growing in stature as a global agricultural powerhouse. American farmers, who for generations have boasted of being the world’s breadbasket, now must struggle with grains prices and aging infrastructure. Washington’s efforts to renegotiate trade agreements also could affect exports. At the same time, cheaper supplier Brazil is reaping the benefit of massive investment in export infrastructure. In 2012/13, the South American country passed the United States as top soy exporter.