Soil Final Exam
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Which one is an epipedon
mollic
Dry soils with ochric epipedons, may have calcic subsurface horizon
aridisol
Soils that have permafrost within the upper horizons
gelisol
Which epipedon is human made?
Plaggen
Soils containing high amounts of organic matter and low bulk density, and develop under water-saturated conditions
histosol
Soils developed in volcanic ash deposits that are often composed of amorphous (non-crystalline) compounds
andisol
The order Spodosol, by definition, must have what diagnostic horizon
spodic
Soils high in swelling-type clays, deep cracks form at the surface when dry
vertisol
Moderate to high base saturation (>35%) in the argillic or natric diagnostic horizon
alfisol
Soft, dark-colored soils of grassland areas, >50% base saturation in surface horizons
mollisol
metamorphic form of limestone
marble
Contains an accumulation of silicate clays
Bt1
The mineral part of the pedosphere
lithosphere
Where is the highest point of elevation in Missouri?
Taum Sauk
Which texture has the most total pore space?
fine-texture soil such as clay
KAlSi3O8 + H2O → HAlSi3O8 + KOH where water reacts to form a more soluble compound
hydrolysis
materials moved in large landslides are this type of material
colluvial
In a horizon 2Bx1, the 1 indicates the
the subdivision of the subordinate horizon
Which bulk density value (g/cm3) is most likely an O horizon
0.6
the subordinate in 2Bx3
x
Horizon most likely to have granular structure
Ap
The top-most mineral horizon
A
The soil most likely to be well-drained (aerated)
7.5YR 4/6
CaCO3 → Ca2+ + CO3 2- is an example of a breakdown into ions
dissolution