What is contained in the soil besides humus?

The soil contains various substances: air, water and particles. Solid particles are the main constituent of the soil, in which 2 components can be distinguished: organic (humus or humus) and inorganic. The inorganic part of the soil consists of the remains of sand, clay (they are able to bind the soil, forming lumps, and prevent too rapid removal of water). Also from stony remains. The soil contains soil air, which is contained in the spaces between soil particles and shows the possibility of life formation in this environment.