Soil Science Quiz 2

Created by zdaniel24 

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Gelisol

"el" soils with permafrost

Entisol

"ent" young soils A and C

Inceptisols

"ept" inception of Bw

Andisol

"and" volcanic soils

Histosol

"ist" organic soils

Aridisol

"id" soils found in arid envrionments

Mollisol

"oll" productive ag soil, A

Vertisol

"ert" high in shrink swell clays

Alfisol

"alf" mature, developed Bt

Spodosol

"od" coniferous forest soils, low pH

Ultisol

"ult" very mature, weather soil

Oxisol

"ox" extremely weather, tropical soils

arg

"clay accumulation"

bor

"cool"

calc

"calcium carbonate"

cry

"very cold"

gyps

"gypsum"

hum

"accumulation of humus"

orth

"common"

psamm

"sandt"

sal

"high in soluable salts"

torr

"hot and dry"

ud

"humid"

ust

"semi arid"

xer

"mediterranean climate"

Texture

proportions of individual sand, silt, clay particles in soil.

Modified Triangle

>40%=Clay Top
>27%=Clay Loam Middle
>difference between % sand and silt, is >10%

Bulk Density

Bd=Mass of oven dry soil/ Total volume of soil

Particle Density

Pd= Mass of oven dry soil/Volcume of soil solids

% Pore Space (porosity)

=100% - Bd/Pd * 100

Factors that affect Bd and Pd

Bd Pd
Compaction: Up Same
Tillage: Down Same
Organic Matter: Down Down

Infiltration

water movement into soil at surface

Percolation

water movement through soil

Aerationn

gas movement in the soil

Permeability

gas, liquid, tree roots, combined

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