The 18" Billy Goat Plugr Aerators is a small easily transported areator for 1/2 acre or less. It is as easy to operate as a walk-behind mower. This unit is more than 50% more productive than traditional aerators and without the operator fatigue associated with traditional aerators because the aerating tines are lifted out of the ground instead of having to raise the back of the machine. Sometimes referred to as a core airrator, walk behind airator, deep tine airrater, walk behind airirator or air-rator, walk-behind Aerorator aireator, yard areator, arator or a plugger or aereator or aeroator or Airiatere or airiator or lawn spiker or air raider or Aerotor or Aeratir or erater