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sys1=[[Single Pit System|1]]|

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|spanish_link=Relleno_y_Cubierta/Arborloo

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[[Image:Icon_fill_and_cover_arborloo.png |right|95px]]

'''When a pit is full, it can simply be filled with soil and covered. Although there is no benefit recovered, the full pit poses no immediate health risk, and with time, the contents will degrade naturally. Alternatively, the ‘Arborloo’ is a shallow pit that is filled with excreta and soil/ash and then covered with soil; a tree planted on top will grow vigorously in the nutrient-rich pit.'''