under crown of old oak in front of the perennial bed, several circular holes are drilled in lawn soil these are aeration and drain

aerated aeration aerification air analysis architecture are bed black breath breathing buried circle circles circular cobblestone crown drain drainage drill drilled drilling dying environment fence filled front garden gardening grass gravel green grid hole holes humidity landscape lawn layer metal not oak old outdoor park pedometer perennial probes quality quercus robur roots sample samples scarification several sidewalk soil street substrate technology these topsoil tree trunk turf under will