Soil profile on the two investigated sites.
| Site | Hor. | Depth | Texture | Structure | Color | Roots | Comments |
|---|---|---|---|---|---|---|---|
| Park soil | Ah1 | 12 cm (4.8 in) | Sandy loam | Granular | Very dark brown | Weed trees | Nutrient-rich, probably on filled topsoil after landscaping |
| Ah2 | 27 cm (10.8 in) | Sandy loam | Light granular | Dark brown | Trees | ||
| B1 | 39 cm (15.6 in) | Silt loam | Compacted | Light gray | None | Compacted from landscaping traffic | |
| Bg | 65 cm (26 in) | Silt loam | Cracked with root channels | Gray + very extensive red mottling | Trees | “Undisturbed” subsoil | |
| Street planting Pit | O1 | 7 cm (2.8 in) | Bark mulch | Very coarse | Brown | None | |
| O2 | 9 cm (3.6 in) | Bark mulch, structure lost | Under decomposition | Light brown | Tree fine root | ||
| Ah | 64 cm (25.6 in) | Artificial topsoil substrate | Light compacted at 9 to 29 cm (3.6 to 11.6 in), below slightly hard, no granulation | Gray | Many tree roots; few roots grow under curbs | High sand content, little humus, little silt, no clay; concrete fundament of curbs to 50 cm (20 in) | |
| B1 | >64 cm (>25.6 in) | Loamy clay | Puddled | Yellow–light brown | Very few tree roots | Not accessible for roots |