Soil geography
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Soil Geography. Sources http://soils.ag.uidaho.edu/soilorders http://www.geo.wvu.edu/~kite/2002SoilsHandout.htm. Theoretical Model of Soil. The Jenny equation (1941) S=f(o, cl, r, p, t) o=organisms cl=climate r=relief p=parent material t=time. Soil Textures. Texture Families.

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Soil Geography

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Soil geography

Soil Geography

  • Sources

    • http://soils.ag.uidaho.edu/soilorders

    • http://www.geo.wvu.edu/~kite/2002SoilsHandout.htm


Theoretical model of soil

Theoretical Model of Soil

  • The Jenny equation (1941)

    • S=f(o, cl, r, p, t)

    • o=organisms

    • cl=climate

    • r=relief

    • p=parent material

    • t=time


Soil textures

Soil Textures


Texture families

Texture Families


Entisol order

Entisol Order

  • recent

  • Soils of recent origin

  • Floodplains

  • Steep, rocky

  • Having only an A horizon


Entisol suborders

Entisol Suborders

  • http://soils.ag.uidaho.edu/soilorders


Soil geography

loamy-skeletal, mixed,

superactive, nonacid,

mesic Lithic Xerorthent

http://soils.ag.uidaho.edu/soilorders


The mollisol order

The Mollisol Order

  • mollis, soft

  • Formed under influence of grassland.

  • Insufficient precipitation to leach the soil.

    • Long-term addition of organic materials from plant roots.

    • Deep, dark colored surface horizon.

    • Fertile soils.


Soil geography

Palouse Series

Haploxeroll

A

AB

BW1

BW2


Mollisols in the u s

Mollisols in the U.S.

  • http://soils.ag.uidaho.edu/soilorders


Mollisol suborders

Mollisol Suborders

  • http://soils.ag.uidaho.edu/soilorders


Cryoll landscape

Cryoll Landscape

http://soils.ag.uidaho.edu/soilorders


Soil geography

fine-loamy, mixed,

superactive

Pachic Argicryoll

http://soils.ag.uidaho.edu/soilorders


Argixeroll landscape

Argixeroll Landscape

  • http://soils.ag.uidaho.edu/soilorders


Soil geography

loamy-skeletal, mixed,

superactive, mesic

Lithic Argixeroll

http://soils.ag.uidaho.edu/soilorders


Alfisol order

Alfisol Order

  • Moderately leached forest soils.

  • Clay accumulation in subsurface horizon.

  • Fertile soils.


Alfisol landscape

Alfisol Landscape

http://soils.ag.uidaho.edu/soilorders


Soil geography

fine-loamy, mixed,

superactive

Typic Haplocryalf

http://soils.ag.uidaho.edu/soilorders


Spodosol order

Spodosol Order

  • od, spodos, wood ashes.

  • Acid soils with subsurface accumulation of humus and Al & Fe oxides.

  • Highly leached E horizon.


Spodosol landscape

Spodosol Landscape

  • http://soils.ag.uidaho.edu/soilorders


Soil geography

  • medial over loamy,

  • Andic Haplocryod

  • http://soils.ag.uidaho.edu/soilorders


Inceptisol order

Inceptisol Order

  • ept, inceptum, beginning

  • Minimal horizon development.

    • Steep slopes, young geomorphic surfaces, resistant parent materials.


Inceptisol suborders

Inceptisol Suborders

  • http://soils.ag.uidaho.edu/soilorders


Inceptisol landscape

Inceptisol Landscape

  • http://soils.ag.uidaho.edu/soilorders


Soil geography

  • loamy-skeletal, mixed,

  • active

  • Xeric Dystrocryept

  • http://soils.ag.uidaho.edu/soilorders


Soil geography

  • loamy-skeletal, mixed,

  • superactive

  • Humic Eutrocryept

  • http://soils.ag.uidaho.edu/soilorders


Andisol order

Andisol Order

  • Primarily soils formed in volcanic ash.

  • Dominated by glass and weathering products of glass.

  • High water-holding capacity.

  • Will ‘fix’ large quantities of phosphorus.


Andisol suborders

Andisol Suborders

  • http://soils.ag.uidaho.edu/soilorders


Volcanic glass

Volcanic Glass

  • http://soils.ag.uidaho.edu/soilorders


Soil geography

  • ashy over sandy-skeletal

  • frigid

  • Typic Vitrixerand

  • http://soils.ag.uidaho.edu/soilorders


Histosol order

Histosol Order

  • ist, histos, tissue

  • Mainly organic materials

  • Restricted drainage to inhibit decomposition of plant materials

  • High carbon, wetlands


Haplosaprist landscape

Haplosaprist Landscape

http://soils.ag.uidaho.edu/soilorders


Soil geography

  • euic, frigid

  • Typic Haplosaprist

  • http://soils.ag.uidaho.edu/soilorders


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