Soils

1
Soils

• HORT 350
• Arboriculture
• Spring 2004

2
ArboricultureHorticulturists rarely deal with
soil!
3
ArboricultureSoil Components
Hygroscopic
4
ArboricultureSoil Components-after compaction
Hygroscopic
5
ArboricultureGrowth limiting bulk density
(g/cm3) soil triangle/ after Daddow and
Warrington 1983
1.40
1.45
1.55
1.65
1.75
6
ArboricultureSoil Compaction following
Construction/ J. Env. Hort. 24884
Disturbed Bulk Density (g/cm3)
Change ()
Undisturbed Bulk Density (g/cm3)
7
ArboricultureRoot Growth vs Soil Compaction /
J. Env. Hort. 24884
Root Dry Weight (g)
Soil Bulk Density g/cm3)
8
ArboricultureSoil Compaction vs Depth/J. Appl.
Ecol. 191671982
Wet loamy sand
Soil Strength (kg/cm2)
Compacted
0 passes
Vehicle Passes (no.)
9
Compaction during home construction
10
ArboricultureLethal temperatures for soil
microorganisms/after Baker 1957
11
Media Particle Size Affects Air Porosity Van
Shoor et al. 1990