Hollow coring is the process of removing a ‘plug’ or ‘core’ from the playing surface to help aerate the surface.
Subsequent top dressing with sand helps to change the soil profile. Hollow coring is used primarily on sand based surfaces to help breakdown the ‘thatch layer’. It also encourages gas exchange within the root zone, giving a better, healthier root system.
The main advantage of hollow coring is that the core of soil is removed out without causing any compression of the root zone.