Rebel Cavalry during the Farroupilha Revolution. Populating Rio Grande do Sul was a constant concern of the Portuguese. To that end, the metropolitan Crown distributed land in the form of enormous latifundia. Up to the beginning of the 19th century, wheat was the main export product of Rio Grande do Sul. The cheap jerky was commonly used as food for the enslaved laborers in other parts of Brazil. But with order restored in these countries, competition by Argentinian and Uruguayan jerky producers became a concern.