Upper layer of the Earth’s crust transformed by weathering and physical/chemical and biological processes. It is composed of mineral particles, organic matter, water, air and living organisms organised in genetic soil horizons.

Note 1 to entry: In a broader civil engineering sense soil includes topsoil and sub-soil; deposits such as clays, silts, sands, gravels, cobbles, boulders and organic deposits such as peat; and materials of natural origin or of human origin.

Source: ISO/DIS 11074

Dernière mise à jour le 08.06.2015