Soil Orders

Question 1

only A horizon over C, found on or within parent materials, poor climatic conditions, considered other soils

Answer 1

Entisols (ent)

Question 2

immature, ochric, no Bt, resistant parent material

Answer 2

Inceptisols (ept)

Question 3

young, high porosity, formed from volcanic ash, highly productive soils, wind and erosion problems, Melanic, low bulk density

Answer 3

Andisols (and)

Question 4

short wet periods, little leaching of cations, low OM, salt accumulations

Answer 4

Aridisols (id)

Question 5

frozen, permafrost, little development

Answer 5

Gelisols (el)

Question 6

must have >30% expanding clays, high expansion and contraction, self mising, big cracks, deep A, poor horizonation

Answer 6

Vertisols (ert)

Question 7

Mollic epipedon, >50% base saturation, very fertile and productive

Answer 7

Mollisols (oll)

Question 8

ochric or umbric (acidic mollic), well developed A, (E) B, C, Bt, >35% base saturation, generally forested soils

Answer 8

Alfisols (alf)

Question 9

ochric or umbric, Bt, well developed horizon hoizons, acidic,

Answer 9

Ultisols (ult)

Question 10

high sand content, ochric, usually have E, Bhs or Bs, highly leaches, very acidic, low base saturation, very infertile, forested areas (sand +pine) = ?

Answer 10

Spodosols (od)

Question 11

very highly weathered, tropicl, ochric or umbric, oxic subsurface horizons, low activity 1:1 clays, Fe and Al oxides, Bo, very low % base saturation

Answer 11

Oxisols (ox)

Question 12

organic soil, histic, 12-18% organic matterial, saturated part of year, high water and nutrient holding capacity, low bulk density

Answer 12

Histosols (ist)

Question 13

ent

Answer 13

Entisols

Question 14

ept

Answer 14

Inceptisols

Question 15

and

Answer 15

Andisols

Question 16

el

Answer 16

Gelisols

Question 17

id

Answer 17

Aridisols

Question 18

ert

Answer 18

Vertisols

Question 19

oll

Answer 19

Mollisols

Question 20

alf

Answer 20

Alfisol

Question 21

ult

Answer 21

Ultisols

Question 22

od

Answer 22

Spodosols

Question 23

ox

Answer 23

Oxisols

Question 24

ist

Answer 24

Histosols

Question 25

moisture regime - saturated w/ water for sufficient periods of the year

Answer 25

Aquic

Question 26

moisture regime - humid climate, no water constraints

Answer 26

Udic

Question 27

moisture regime - part of the growing season may be dry, plants might have problems finding water

Answer 27

Ustic

Question 28

moisture regime - dry, desert, very limited growing season

Answer 28

Aridic

Question 29

moisture regime - Mediterranean style, cool wet winter and dry hot summers

Answer 29

Xeric

Question 30

temperature regime - \< 8 degrees C, cool summer

Answer 30

Cryic

Question 31

temperature regime - \> 8 degrees C, warmer in summer

Answer 31

Frigid

Question 32

temperature regime - 10-15 degrees C

Answer 32

Mesic

Question 33

temperature regime - 15-22 degrees C

Answer 33

Thermic

Question 34

Entisols (ent)

Answer 34

only A horizon over C, found on or within parent materials, poor climatic conditions, considered other soils

Question 35

Inceptisols (ept)

Answer 35

immature, ochric, no Bt, resistant parent material

Question 36

Andisols (and)

Answer 36

young, high porosity, formed from volcanic ash, highly productive soils, wind and erosion problems, Melanic, low bulk density

Question 37

Aridisols (id)

Answer 37

short wet periods, little leaching of cations, low OM, salt accumulations

Question 38

Gelisols (el)

Answer 38

frozen, permafrost, little development

Question 39

Vertisols (ert)

Answer 39

must have \>30% expanding clays, high expansion and contraction, self mising, big cracks, deep A, poor horizonation

Question 40

Mollisols (oll)

Answer 40

Mollic epipedon, \>50% base saturation, very fertile and productive

Question 41

Alfisols (alf)

Answer 41

ochric or umbric (acidic mollic), well developed A, (E) B, C, Bt, \>35% base saturation, generally forested soils

Question 42

Ultisols (ult)

Answer 42

ochric or umbric, Bt, well developed horizon hoizons, acidic,

Question 43

Spodosols (od)

Answer 43

high sand content, ochric, usually have E, Bhs or Bs, highly leaches, very acidic, low base saturation, very infertile, forested areas (sand +pine) = ?

Question 44

Oxisols (ox)

Answer 44

very highly weathered, tropicl, ochric or umbric, oxic subsurface horizons, low activity 1:1 clays, Fe and Al oxides, Bo, very low % base saturation

Question 45

Histosols (ist)

Answer 45

organic soil, histic, 12-18% organic matterial, saturated part of year, high water and nutrient holding capacity, low bulk density