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
Uruguay national rugby union team in 1948, in a game against Chile, which Uruguay lost 21–3. Following their debut match, they return to competition in the Pan American Games, first against the more experienced Argentina, resulting in a 0–62 loss. Uruguay then faced Chile for the second time, defeating them by 8–3. The final match of the competition was a 17–10 win over Brazil. Uruguay thus became runners up in the first unofficial South American Rugby Championship. Uruguay, after a four years hiatus, played Chile in 1956, who defeated them by 6–3. In 1958, they played for the first official South American Rugby Championship, in