Lesson 2.1: Soil Profile

Question 1

High content of expanding clay minerals

Answer 1

Vertisols

Question 2

Vertisols changes in volume with changes in _____

Answer 2

Moisture

Question 3

Vertisols have cracks that ____ and ____ periodically. This shows that soil movement in the profile happens

Answer 3

Close and open

Question 4

Vertisols _____ when wet, slowing down the water transmission. Hence slowing ____

Answer 4

Swell, leaching

Question 5

High in natural fertility

Answer 5

Vertisols

Question 6

2% of world’s ice-free land surface

Answer 6

Vertisols

Question 7

Parent material + Solum + O horizon

Answer 7

Regolith

Question 8

Horizon A and B

Answer 8

Solum

Question 9

Consist of undecomposed liter

Answer 9

Horizon O1

Question 10

Consist of partly decomposed liter

Answer 10

Horizon O2

Question 11

Humus accumulation

Answer 11

A1

Question 12

Strongest leaching

Answer 12

A2

Question 13

Maximum illuviation

Answer 13

B2

Question 14

Uncosolidated parent material

Answer 14

Horizon C

Question 15

Consolidated Bedrock

Answer 15

Horizon R

Question 16

Tells the story of soil formation

Answer 16

Soil Profile

Question 17

In soil profile, _____ differs through forces of weathering

Answer 17

Soil horizons

Question 18

Early stage of horizon differentiation

Answer 18

Addition of OM

Question 19

Soil formation is greatly influenced by living organisms

Answer 19

Addition of OM

Question 20

Growth and death of plants add OM that would eventually form horizon ____

Answer 20

A

Question 21

Involves the process of leaching

Answer 21

Loses and removals from soil body

Question 22

Resistant oxides of _____ and ____ predominates the soil layer

Answer 22

Iron and Aluminum

Question 23

Leaching of salts and eluviation of soil materials

Answer 23

Translocation or transfer within the soil

Question 24

Process of translocation from the start

Answer 24

Rain&raquo_space; horizon A&raquo_space; Carbon dioxide reacts with water forming Carbonic acids&raquo_space; Carbonic acids react with other minerals&raquo_space; dissolution of minerals

Question 25

Solublue salts

Answer 25

Carbonates of Ca, K, Na

Question 26

Soluble salts (Calcium, Potassium, Sodium) are slowly leached, forming _____

Answer 26

Acid soil profile

Question 27

Usual location of carbonates

Answer 27

Horizon C, lower B horizon

Question 28

Involves chemical weathering, synthesis of new materials, interaction between inorganic and organic materials

Answer 28

Transformation