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In southern Bolivia, in the transitional region between the barren foothills of the Andes and the wetter valleys of the Tariquía National Flora and Fauna Reserve. Smallholders on the slopes and in the valleys mainly grow maize, wheat and barley. The picture shows the traditional method of winnowing (separating the chaff from the wheat or grain) by hand. The farmers toss the threshed grain high into the air using pitchforks or shovels. The wind blows the light chaff (husk and straw remnants) to one side. The heavier grains fall straight down to the ground and are thus collected cleanly. This method has been used for thousands of years. It requires no machinery and relies solely on the power of the wind. – Bolivia – 1976

Winding its way along the slopes in long hairpin bends, mostly without any engineering structures, this Andean road runs through the department of Tarija in Bolivia. - Book: Picture 182 - Bolivia - 1976