Translations:Benutzer:Arian/Klett-Mini-Test/1228/en

On account of the materialistic way of looking at things — substance, regardless of its origin, is one and the same substance — one is repeatedly inclined to search for methods by which the «valuable nutrients» N, P, K of human faecal matter might yet be made serviceable for plant cultivation. The practice of vegetable production on the so-called «sewage fields» near large cities has been abandoned. Sewage sludge drying and composting is practised with success. Yet the product ought to be employed exclusively outside agriculture — for restoration purposes in road-building and landscape construction.