An apparatus for cutting grass in a cut area delimited by a perimeter, the perimeter being defined by the presence of regions of grass surface, comprises a lawn-mower and a lawn-mower-recovery base, the lawn-mower comprising a motor unit, a cutting device, the lawn-mower-recovery base being disposed along the perimeter with an accessible aperture allowing the entry of the lawn-mower moving along it, the lawn-mower further comprising a proximity sensor able to detect the presence of a grass surface, a control unit associated with the sensor, the control unit being configured to detect the perimeter, the control unit being configured to determine a condition of alignment of the lawn-mower with the perimeter, the control unit being operatively connected to the motor unit to cause a displacement of the lawn-mower along the same perimeter, to operate the return of the lawn-mower into the lawn-mower-recovery base.

 
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