Urban Tree Soil

Composed of a moist friable, slightly calcareous sand with a single grain structure, it falls into a sand texture classification. Urban Tree Soil is a medium sand with suitable levels of porosity that can be maintained, and the risk of compaction is minimized. It has good water holding characteristics and exceeds the minimum requirements for the Californian Bearing Ratio.

Urban Tree Soil should be installed at depths no greater than 600 mm, greater depths should be built up with Boughton Loam's subsoil products.

Urban tree soil is suitable for tree planting in hard landscape environments. Boughton Loam can provide additional advice if needed on how best to specific and install this soil.

Features and benefits:

• Offers better drainage and heightened stability alongside improved access of oxygen and water to the tree’s root system.
• Also known as Amsterdam tree soil.
• Particle size distribution (80:20 mix):
• Clay (<0.002 mm): 4%.
• Silt (0.002–0.063 mm): 1%.
• Very fine sand (0.05–0.15 mm): 4%.
• Fine sand (0.15–0.25 mm): 20%.
• Medium sand (0.25–0.5 mm): 59%.
• Coarse sand (0.50–1.0 mm): 12%.
• Very coarse sand (1.0–2.0 mm): 0%.
• Texture class (UK classification): S.
• Chemical:
• pH value (1:2.5 water extract): 7.8.
• Electrical conductivity (1:2.5 water extract): 730 uS/cm.
• Electrical conductivity (1:2 CaSO₄ extract): 3114 uS/cm.
• Exchangeable sodium percentage: 2.9%.
• Organic matter (LOI): 2.8%.
• Total nitrogen (Dumas): 0.09%.
• C:N ratio: 18.
• Extractable phosphorus: 38 mg/L.
• Extractable potassium: 1025 mg/L.
• Extractable magnesium: 58 mg/L.

Typical analysis; a full analysis is available on request