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SSC A > CRS > Flashcards

CRS Flashcards

1
Q

expressed in milliequivalent per 100g of the soil

A

CEC

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2
Q

any element that has positively charged such as Ca²+

A

cations

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3
Q

the ability of soil particles to absorb or adsorb and store anions

A

AEC

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4
Q

any element that is negatively charged such as Cl-

A

anions

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5
Q

net result of the overall negative charge of the oxygen atom and the overall positive charges of two hydrogen atoms

A

polarity

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6
Q

Clay with 1:1 fixed lattice type (less expanding) belong to what clay group?

A

kaolinite group

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7
Q

this refers to the process by which soil nutrients such as NO3 are washed down by water from the root zone of the plant

A

leaching

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8
Q

the practice of covering the soil surface with materials that can maintain an ideal soil temperature.

A

mulching

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9
Q

a kind of acidity which is due to the hydrogen ion concentration of the soil soulution

A

active

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10
Q

the most common smectite is among the “swell clays”

A

Montmorillonite

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11
Q

a state of subdivision of a particle in the soil such that surface properties predominate

A

colloid

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12
Q
A
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13
Q

shape of peds

A

type

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14
Q

soil moisture retention, soil water content resulted to plants remaining permanently wilted

A

permanent wilting point

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15
Q

geometry/physical arrangement of the soil particles

A

soil structure

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16
Q

soil moisture retention, soil is dry that any water present is held so tightly.

A

hygroscopic corfficient

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17
Q

physical classification of gravitational water

A

free water

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18
Q

structure formed due to external forces

A

dod

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19
Q

physical classification of water held between field capacity and hygroscopic coefficient

A

capillary water

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20
Q

modification of texture, structure or at natural surfaces in soil materials due to concentration of particular soil constituents

A

cutans

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21
Q

physical classification of water held at hygroscopic coefficient

A

hygroscopic water

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22
Q

amount of H ions in soil

A

soil pH

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23
Q

free water is biologically classified as___.

A

superfluous water

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24
Q

movement of gases within a mixture.

A

diffusion

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25
Q

measure of purity and strength of spectral color.

A

chroma

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26
Q

term used to describe resistance of soil to various mechanical ease within which soil can be reshaped.

A

consistence

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27
Q

measuring device used to measure temperature of soil.

A

thermometer

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28
Q

method of controlling soil temperature by covering the soil surface with materials such as plants.

A

mulching

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29
Q

layers shown within the vertical distribution of the soil.

A

soil horizon

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30
Q

method of controlling soil temperature by mixing the soil.

A

tillage

31
Q

soil consistence, quality of adhesion to other objects.

A

stickiness

32
Q

capillary water is biologically classified as____.

A

available water

33
Q

dark or glossy color is an indication that the soil is high in____.

A

organic matter

34
Q

in the hand texturing method, soil particles feel gritty.

A

sand

35
Q

yellow color of the soil.

A

goethite

36
Q

green color of the soil.

A

gialconite

37
Q

red color of the soil.

A

hematite

38
Q

soil consistence, pertains to the capacity of being molded.

A

plasticity

39
Q

3-D unit that represents the entire soil body.

A

Pedon

40
Q

spheroid polyhedron structure having plane or curved surfaces which have slight or no accommodations to the surrounding peds / nonporous

A

granular

41
Q

in the hand texturing method, soil particles feel sticky.

A

clay

42
Q

in the hand texturing method, soil particles feels smooth like flour.

A

silt

43
Q

soil layer where most of the nutrients and organic matter accumulate

A

A Horizon

44
Q

the most obvious feature of the soil.

A

soil color

45
Q

cutans, formed when peds press against each other during soil wetting.

A

stress cutans

46
Q

cutans, is a thin layer of metal oxide

A

oxide cutans

47
Q

Prismlike, with two dimensions limited and considerably less than the vertical; without rounded caps.

A

prismatic

48
Q

Prismlike, with two dimensions limited and considerably less than the vertical; with rounded caps.

A

columnar

49
Q

Platelike, with one dimension

A

Platy

50
Q

used to determine the relative contributions of the fine fraction.

A

hand texturing

51
Q

Approximately half of the volume of a soil is a ________ space.

A

pore

52
Q

Organic horizon in which essentially the original form of most vegetative matter; visible to naked eye.

A

O1 horizon

53
Q

Organic horizon in which essentially the original form of most vegetative matter; visible to cannot be recognized with the naked eye.

A

O2 horizon

54
Q

buried soil horizon

A

b

55
Q

accumulation of carbonate

A

ca

56
Q

accumulation of calcium sulfate

A

cs

57
Q

frozen soil

A

f

58
Q

illuvial humus

A

h

59
Q

illuvial iron

A

ir

60
Q

strong cementation

A

m

61
Q

plowing or other disturbance

A

p

62
Q

accumulation of salt

A

sa

63
Q

cementation by siliceous material.

A

si

64
Q

illuvial clay

A

t

65
Q

fragipan character

A

x

66
Q

simply the uppermost soil horizon.

A

epipedon

67
Q

combined forces of cohesion and adhesion.

A

surface tension

68
Q

if the soil shrinks and no air will enter the pore spaces, the soil particles are brought closer and closer together.

A

shrinkage and repulsive forces

69
Q

It is the key to understanding the occurrence of water. It is the continuous circulation of water between the earth’s surface and the atmosphere.

A

hydrologic cycle

70
Q

solute lower the water pressure of the soil and decrease its force energy.

A

pressure of osmotically active solute

71
Q

brown soil color

A

maghematite

72
Q

black soil color (dili organic matter)

A

manganese oxide

73
Q

white soil color

A

carbonates

74
Q

reduced iron

A

gray or bluish

SSC A (1 decks)

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