understanding systematic variability of soil properties and deep regolith in the southern sierra czo...
TRANSCRIPT
Understanding systematic variability of soil properties and deep regolith in the
Southern Sierra CZOToby O’Geen, UC Davis
Subalpine forest3000 m
Mixed Coniferous Forest 2000 m
Pine/Oak Forest1100 m
Oak Savannah400 m
Subalpine forest3000 m
Mixed Coniferous Forest 2000 m
Pine/Oak Forest1100 m
Oak Savannah400 m
Deg
ree
of W
eath
erin
g
Elevation (m)400 1100 2000 3000
Deep regolithSoil
Regional patterns in soil development and regolith thickness
1100 2000 3000
Some pedologic questions:• What are the dominant factors
controlling soil development across the gradient? It may not be what previous studies thought.
• What is the extent of soil variability within each catena?
Soil Variability at San Joaquin Experimental RangeDepth
Some deep regolith questions:
• What soil forming factors are most important in describing spatial patterns in regolith thickness? Do quantifiable proxies exist (i.e. terrain attributes, solar radiation models, gamma-ray imagery)?
• How variable is regolith thickness within each catena? To what extent do terrain attributes describe this variability?
• How do other regolith characteristics very across the CZO transect?