Geography of South America world by drainage area—the Amazon River and the more southerly Paraná River. The other major river of this central lowland is the Orinoco River, which has a natural channel linking it with the Amazon. Most of this central lowland is sparsely populated because the soils are heavily leached, but in the south is the very fertile pampas of Argentina—one of the world's major food-producing regions where wheat and beef cattle are pre-eminent. The natural vegetation of the northern lowlands are either savanna in the northern "llanos" and southern "campos", or tropical rainforest throughout most of the Amazon basin. Efforts to
Argentina–Uruguay relations Fray Bentos, Paysandú and Salto). Uruguay has an embassy in Buenos Aires and 2 general consulates (in Córdoba and Rosario), 3 consulates (in Colón, Concordia and Gualeguaychú), 2 honorary consulates (in Mendoza and Neuquén). Both countries were founding members of the Mercosur. Both countries are full members of the Group of 77, of the Rio Group, of the Latin American Integration Association, of the Association of Spanish Language Academies, of the Organization of American States, of the Organization of Ibero-American States, of the Union of South American Nations, and of the Cairns Group. Uruguay in 2009 maintained its policy of