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 born in Uruguay living in Argentina. The two major political parties of Uruguay before 2002 the Colorado Party and the National Party, both called traditional parties have its origins at extinct Argentinian Parties, Unitarians and Federals who in turn were descendants of bands of José Artigas. During the first century of Uruguayan Independence mayor events on both sides were chained to the international two party alliance/rivalry constituted in separate nationalized structures. Argentinian Civil War started after Uruguayan Civil War in 1838, when Uruguayan ex-president Fructuoso Rivera deposed former Uruguayan president Manuel Oribe who exiled in Buenos Aires. Limits between Argentina