Sentence:  The overwhelming majority of maca roots are dried after harvest. In the cold, dry atmosphere of the <WSD>puna</WSD> the dried roots remain edible for several years. A minor proportion of the freshly harvested roots are roasted in huatias, earthen ovens ... 
Meaning of the word marked with <WSD> tags:  An alpine biological community in the central portion of the Andes in which short, coarse grass supports a Native American population.