Soil Resources - Part II

Question 1

Why is Red soil red in colour?

Answer 1

Due to the concentration of Iron Oxide

Question 2

Ancient crystalline and metamorphic rocks of the ________ area break up to form red soil

Answer 2

Peninsular Plateau

Question 3

_______ soil forms the second largest soil group of India

Answer 3

Red soil

Question 4

Regions where red soil is found?

Answer 4

Maharashtra, Odisha, Jharkhand, Bundelkhand

Question 5

pH value of red soil?

Answer 5

6.6 to 8.0

Question 6

Characteristics of red soil?

Answer 6

1. Red soil is red in colour due to the concentration of Iron Oxide
2. It is porous and poor in nitrogen, phosphorous and potassium
3. Contains soluble salts in small quantities

Question 7

Crops of red soil?

Answer 7

P - Potato
T- Tobacco 
G - Groundnut 
R - Rice 
R - Ragi

Question 8

What is laterite soil?

Answer 8

Laterite soil is the soil formed as a result of atmospheric weathering of rocks

Question 9

What is leaching?

Answer 9

The percolation of the nutrients of the of the soil due to heavy rainfall leaving the top soil infertile

Question 10

Other name for leaching?

Answer 10

Desilication

Question 11

The two types of laterite soils?

Answer 11

Upland laterite and Lowland laterite

Question 12

What is Upland laterite soil?

Answer 12

The laterite soil which is formed over hills and uplands

Question 13

What is Lowland laterite soil?

Answer 13

The soil transported from the highlands to the lowlands by the streams

Question 14

What are the characteristics of Laterite soil?

Answer 14

1. It is coarse in texture
2. It is rich in iron oxide and is subjected to leaching
3. Deficient in nitrogen
4. Acidic in nature and is used for building purpose

Question 15

Regions under laterite soil?

Answer 15

Madhya Pradesh, Odisha, Maharashtra, West Bengal, Andhra Pradesh, Karnataka and Tamil Nadu

Question 16

Crops associated with laterite soils?

Answer 16

C - Coffe
R - Rice
R - Ragi
R - Rubber
S - Sugarcane
T - Tea

Question 17

What is Soil erosion?

Answer 17

The removal of the top soil cover by running water, wind and human activities is known as soil erosion

Question 18

What are the types of soil erosion?

Answer 18

1. Erosion by water:
   i. Sheet erosion
   ii. Rill erosion
   iii. Gully erosion
   iv. Leaching
   v. Sea or Shore erosion
   vi. Stream Bank Erosion
2. Erosion by Wind

Question 19

3 things which lead to soil erosion?

Answer 19

Faulty agricultural practices, overgrazing, deforestation

Question 20

3 things which help in the conservation of soil?

Answer 20

Improved agricultural practices, reduced pressure of overgrazing and afforestation

Question 21

Alluvial soil is formed by the deposition of ……………………… as it flows from its upper to lower course

Answer 21

river load

Question 22

Alluvial soil is formed by the deposition of river load as it flows from ………………………. to ………………………

Answer 22

upper to lower course

Question 23

…………………………… is found upto a depth of 500m

Answer 23

Alluvial soil

Question 24

Alluvial soil is found upto a depth of ……….. meters

Answer 24

500

Question 25

Alluvial Soil is easily .....................

Answer 25

tillable

Question 26

Maharashtra, Mtadhya Pradesh, Andhra Pradesh, Karnataka and Tamil Nadu are a part of .............................

Answer 26

Deccan lava tract

Question 27

The ............................. of black soil makes it suitable for dry farming

Answer 27

moisture retentiveness

Question 28

What is the pH value of red soil

Answer 28

6.6 to 8.0

Question 29

Besides human activity, soils are degraded by nature during ...................... and ................................

Answer 29

droughts and floods

Question 30

Sheet erosion occurs on ...................................... areas where ................... is destroyed

Answer 30

gentle slope, vegetation

Question 31

When sheet erosion occurs for long, the silt-laden run-off forms many ...................................... over a large area

Answer 31

finger-shaped rills or grooves

Question 32

........................................... is the intermediate stage between sheet erosion and gully erosion

Answer 32

Rill erosion

Question 33

....................... erosion removes nutrients and heavy load of loose soil making the soil unproductive

Answer 33

gully

Question 34

...................... occurs when there is heavy downpour when the farmers leave the soil bare for some time after harvesting

Answer 34

leaching

Question 35

................................. is the slow removal of thin layer of soil when vegetation is destroyed

Answer 35

sheet erosion

Question 36

What type of water is involved in sea or shore eroision?

Answer 36

A) Underground water B) Rainwater C) Atmospheric water D) Tidal water option D is right

Question 37

Where does sea or shore erosion occur?

Answer 37

Eastern and Western coasts of India

Question 38

As a result of ........................... large agricultural areas in the Uttar Pradesh and Madhya Pradesh and Rajasthan is getting transformed into ravines

Answer 38

Stream bank erosion