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 refusing landing rights for British military planes on their flights to the Falkland Islands () and in 2010 refused entry to the Port of Montevideo of Argentina–Uruguay relations Argentina–Uruguay relations are foreign relations between the Argentine Republic and the Eastern Republic of Uruguay. Both countries were part of the Spanish Empire until the early 19th century. Initially, both modern states of Argentina and Uruguay were part of the Viceroyalty of the Río de la Plata. Buenos Aires was by then the Capital city, and the Banda Oriental a province of it. During this period, both Buenos Aires and Montevideo faced