Els walipinis, hivernacles enterrats per suavitzar les temperatures

Catalan agroecology magazine article tracing walipini from Swiss aid in El Alto through Ventilla reconstruction, noting it is NOT ancestral, and reporting a first experiment at Vallbona d’Anoia (Catalonia) adapting the form to Mediterranean latitudes. States Aymara word means, according to sources, either "aixopluc càlid" (warm shelter) or simply "està bé," practically a semi-buried greenhouse. Explicitly rejects ancestral-origin myth: technology invented early 1990s by a Swiss cooperator with European funds at El Alto; project interrupted by his sudden death. Narrates later reconstruction of ruins near La Paz into Granja Ventilla ecological farm, becoming a national reference, with 18 walipinis growing chard, lettuce, oregano, thyme, sage, celery, green cabbage, rhubarb, spinach, and corn salad ("l’enciam suís"). Argues Andean low latitude (intertropical) with near-vertical solar radiation suits pit greenhouses; low wind profile and reduced crop water use are advantages on the Altiplano.

Evidence tier: popular_guide. Magazine feature; Vallbona experiment details appear paywalled/subscription in places.

popular_guide|candidate