despite eradication programmes in some countries, remains an important crop for legal local use in a mildly stimulating herbal tea, and, both controversially and illegally, for the production of cocaine. Irrigation In unirrigated land, pasture is the most common type of land use. In the rainy season (summer), part of the rangeland is used for cropping (mainly potatoes, barley, broad beans and wheat). Irrigation is helpful in advancing the sowing data of the summer crops which guarantees an early yield in the period of food shortage. Also, by early sowing, maize can be cultivated higher up in the mountains (up to ). In addition, it makes cropping in the dry season (winter) possible and allows the cultivation of frost-resistant vegetable crops like onion and carrot. Mining The Andes rose to fame for their mineral wealth during the Spanish conquest of South America. Although Andean Amerindian peoples crafted ceremonial jewelry of gold and other metals, the mineralizations of the Andes were first mined on a large scale after the Spanish arrival. Potosí in present-day Bolivia and Cerro de Pasco in Peru were among the principal mines of the Spanish Empire in the New World. Río de la Plata and Argentina derive their names from the silver of Potosí. Currently, mining in the Andes of Chile and Peru places these countries as the first and second major producers of copper in the world. Peru also contains the 4th largest goldmine in the world: the Yanacocha. The Bolivian Andes produce principally tin although historically silver mining had a huge impact on the economy of 17th century Europe. There is a long history of mining in the Andes, from the Spanish silver mines in Potosí in the 16th century to the vast current porphyry copper deposits of Chuquicamata and Escondida in Chile and Toquepala in Peru. Other metals including iron, gold, and tin in addition to non-metallic resources are important. Peaks This list contains some of the major peaks in the Andes mountain range. The highest peak is Aconcagua of Argentina (see below). Argentina Aconcagua, Cerro Bonete, Galán, Mercedario, Pissis, Border between Argentina and Chile Cerro Bayo, Cerro Fitz Roy, or 3,405 m, Patagonia, also known as Cerro Chaltén Cerro Escorial, Cordón del Azufre, Falso Azufre, Incahuasi, Lastarria, Llullaillaco, Maipo, Marmolejo, Ojos del Salado, Olca, Sierra Nevada de Lagunas Bravas, Socompa, Nevado Tres Cruces, (south summit) (III Region) Tronador, Tupungato, Nacimiento, Bolivia Janq'u Uma,