Abstract: A method and mass for the drainage, irrigation and lightening of soils is constituted by hollow elements dispersed in soil so as to define capillary or semi-capillary passages. The elements are bulked up so that they can rest in an irregular fashion one relative to the others by providing in between them spaces of variable shapes and dimensions thereby to supply drainage, irrigation, lightening and enrichment of soils.

Abstract: The wall construction is prefabricated from self-connectable elements divided each into four compartments by cross-pieces and each comprising a first hollow elements with a square frame forming also cross-pieces and diagonal ribs. The first hollow element has on one side protruding fingers for cooperating with a facing plate formed with holes corresponding to the protruding fingers, the diagonal ribs protruding on other side of the frame and being each formed with at least one notch complementary to that of the similar diagonal ribs carried by a second element made in the same manner as the first element but closed on its side opposite to that form which protrude the diagonal ribs so that said second element forms a facing surface.

Abstract: The mass for the drainage, irrigation and lightening of soils is constituted by hollow elements (1) delimiting capillar or semi-capillar passages. The elements (1) are bulked up so that they can rest in an irregular fashion one relative to the others by providing inbetween spaces of variable shapes and dimensions.Drainage, irrigation, lightening, enrichment of soils.