1. Soils HORT 350 Arboriculture Spring 2004

2. Arboriculture Horticulturists rarely deal with soil!

3. Arboriculture Soil Components Hygroscopic

4. Arboriculture Soil Components-after compaction Hygroscopic

5. Arboriculture Growth limiting bulk density (g/cm 3 ) soil triangle/ after Daddow and Warrington 1983 1.75 1.40 1.45 1.65 1.55

6. Arboriculture Soil Compaction following Construction/ J. Env. Hort. 2:48:’84 Disturbed Bulk Density (g/cm 3 ) Undisturbed Bulk Density (g/cm 3 ) Change (%)

7. Arboriculture Root Growth vs Soil Compaction / J. Env. Hort. 2:48:’84 Root Dry Weight (g) Soil Bulk Density g/cm 3 )

8. Arboriculture Soil Compaction vs Depth/ J. Appl. Ecol. 19:167:1982 Vehicle Passes (no.) Soil Strength (kg/cm 2 ) Wet loamy sand 0 passes Compacted

9. Compaction during home construction

10. Arboriculture Lethal temperatures for soil microorganisms/ after Baker 1957

11. Media Particle Size Affects Air Porosity Van Shoor et al. 1990 0 10 20 30 40 50 60 70 AserinCortezaTurbaArena <1 mm 1-2 mm Porcentaje (%) Componente