Composition of soil air

Composition of soil air
    Soil air contains gases like nitrogen, oxygen, carbon dioxide, water vapour and others. The composition of soil air is different from atmospheric air. Soil air contains more carbon dioxide and less oxygen than atmospheric air. It also contains more water vapour than atmospheric air. The nitrogen content of soil air is almost equal to atmospheric air.
    Composition of soil and atmospheric air
    Source Per cent by volume
    Nitrogen Oxygen Carbon dioxide
    Soil air 79.2 20.0 0.35
    Atmospheric air 79.0 21.0 0.03

Last modified: Wednesday, 11 April 2012, 4:20 AM