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  Rootzone Gas Exchange advert image shown if present

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The forced changing, by specialist air pump machinery, which is typically connected to the drainage system, of soil gases with atmospheric gases to refresh rootzone air composition. Rootzone air (as well as moisture) can be pulled down, by creating a vacuum, through the profile and removed from the pitch. By contrast, the air pump can blow fresh air into the soil profile via the drainage pipe system. An example of this system is provided by SubAir.