under the crown of the old oak in front of the perennial bed, several circular holes are drilled in the lawn in the soil. these ar

aerated aeration aerification air analysis architecture are bed black breathing circle circles circular cobblestone crown drainage drill drilled drilling environment fence filled front garden gardening grass gravel green grid hole holes humidity hummate landscape lawn layer leaf metal oak old outdoor park pedometer perennial probes quality quercus robur roots sample samples scarification several sidewalk soil street substrate technology these tree trunk turf under will