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 football rivalry "the golden age" of the competition, due to Argentina and Uruguay were the predominant teams in South America by then and the Copa Lipton was the most important competition for both sides, considering that CONMEBOL had not been established until 1916. Other notable competition for both sides was the Copa Newton, first held in 1906 and continued on an annual basis until 1930. It has only been played sporadically since, with the last edition being contested in 1976. Apart from Copa Lipton and Copa Newton, other two competitions were established, with the particularity of each one being hosted in each