SWES 200

Alfisol

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(Definition)

found in semiarid to moist areas Come from leached clay minerals make up 10% of of worlds surface

(Name the soil order)

Andisol 

(Definition)

– high water and nutrient holding capacity

– found in cool areas with moderate precipitation especially near volcanic materials

– highly productive soils

-make up 1% of world

(name soil order)

Aridisol

(Definition)

– lack of moisture restricts rapid weathering 

– common in deserts of the world

-accumulates gypsum, salt and calcium carbonate (which are easily leached from soils)

– make up 12% of world 

(name the soil order)

Entisol

(Definition)

– little or no evidence of horizon development

– occur in areas where parent material had been recently deposited or where erosion is faster than soil development.

– have ochric epipedon

-make up 8% of world

-examples are dunes, or floodplains

(name soil order)

Gelisol

(Definition)

– have permafrost near soil surface

-common in higher latitudes and elevations

– make up 9% of world soil 

(name soil order)

Histosol 

(Definition)

– high organic matter content

– saturated year-round 

– form in decomposed plants that accumulate more than they decay

-make up 1% of worlds soils 

(name soil order)

Inceptisol

(Definition)

-from semi-arid and humid environments

-moderate weathering and development

– Lack of development due to erosion, resistant PM, or recent deposition

– make up 9% of the worlds soils

(name soil order)

Mollisol

(Definition)

-high organic matter in upper horizons

-very fertile

– form under grass from climates that have moderate seasonal moisture deficit

– make up 7% of the worlds soils

(name soil order)

Oxisol

(Definition)

– highly weathered soil from tropic to sub-tropic areas

-have indistinct horizons 

– low activity minerals (ir kaolinite, quartz and iron oxides)

– low natural fertility and low ability to retain additions and fertilizer

– make up 8% of worlds soils

(name soil order)

Spodosol

(Definition)

– form form weathering process that strip organic matter

-commonly occur in areas course-textured deposits, forests and humid regions

-tend to be acidic and infertile

– make up 4% of the worlds soils

(name soil order)

Ultisol

(Definition)

– high leaching and weathering

leaving clay-enriched subsoil

– found in humid areas

-acid soils with nutrients found in top

few inches of soil

-make up 8% of worlds soils  

(name soil order)

Vertisol

(Definition)

-high content of expanding clays 

– swell when wet, transmit water slowly meaning slow leaching

-high in natural nutrients

– make up 2% of the worlds soils

(name soil order)

Alfisol

(name root)

“alf”

(name soil order)

Aridisol

(name root)

“id”

(name soil order)

Gelisols

(name root)

“el”

(name soil order)

Inceptisol

(name root)

“ept”

(name soil order)

Oxisol

(name root)

“ox”

(name soil order)

Ultisol

(name root)

“ult”

(name soil order)

Andisol

(name root)

“and”

(name soil order)

Entisol

(name root)

“ent”

(name soil order)

Histosol

(name root)

“ist”

(name soil order)

Mollisol

(name root)

“oll”

(name soil order)

Spodosol

(name root)

“od”

(name soil order)

Vertisol

(name root)

“ert”

(name soil order)