Soil Resources - Part III

Question 1

What are the types of erosion that are classified as Soil Erosion By Water?

Answer 1

SOIL EROSION BY WATER:

1) Rill Erosion
2) Sheet Erosion
3) Gully Erosion
4) Leaching
5) Sea or Shore Erosion
6) Stream Bank Erosion

Question 2

Rill erosion occurs due to the absence of ………………..

Answer 2

absorbent topsoil

Question 3

………………….. during heavy rains causes gully erosion

Answer 3

water-run off

Question 4

The people in the areas subjected to monsoon rains and soil erosion practice ……………………….

Answer 4

shifting cutivation

Question 5

Wind moves particles ……. to ………. mm in size in a bouncing and hopping fashion

Answer 5

0.1 to 0.5 mm

Question 6

Wind moves particles 0.1 to 0.5 mm in size in a ………………… and …………………. way

Answer 6

bouncing and hopping

Question 7

Wind moves particles greater than 0.5mm in a ………………….. way

Answer 7

rolling

Question 8

Wind erosion is most visible in ……………. stage

Answer 8

suspension

Question 9

The particles smaller than 0.1 mm or finest particles are subjected to ………………….

Answer 9

suspension

Question 10

Wind moves particles greater than ………..mm in a rolling way

Answer 10

0.5mm

Question 11

The particles smaller than …………mm or …………………….. are subjected to suspension

Answer 11

0.1mm or finest particles

Question 12

The movement of soil particles that are 0.1-0.5mm in size by wind in a bouncing or hopping way is called ……………………………

Answer 12

saltation

Question 13

The movement of soil particles that are greater than 0.5mm in size by wind by rolling is called ……………………..

Answer 13

soil creep

Question 14

Suspension of soil particles lesser than 0.1mm in size are visible in the form of ……………….. and ……………………..

Answer 14

dust storms and deposition across roads and fence lines

Question 15

What are the causes of soil erosion?

Answer 15

1) Heavy population pressure on land
2) Nature of rainfall
3) Overgrazing
4) Bad farming techniques
5) Topography
6) Deforestration

Question 16

Where is gully erosion seen?

Answer 16

Chambal valley

Question 17

Where is stream bank erosion prevalent?

Answer 17

In the flood plains of Ganga, Yamuna and other rivers

Question 18

Which regions in India are affected by soil erosion due to the bad topography?

Answer 18

Northeastern parts of India, the Shiwaliks and hilly regions of South India

Question 19

In India, soil erosion is responsible for ……………………………..

Answer 19

low agricultural productivity

Question 20

According to an estimate, every year rainwater alone washes away ………….cm thick fertile topsoil

Answer 20

1/8

Question 21

According to an estimate, every year ………………….. alone washes away 1/8cm thick fertile topsoil

Answer 21

rainwater

Question 22

According to an estimate, every year rainwater alone washed away 1/8cm thick …………………………………

Answer 22

fertile topsoil

Question 23

States that are affected by soil erosion

Answer 23

Rajasthan, Madhya Pradesh, Gujarat, Uttar Pradesh, Karnataka, Andhra Pradesh, Maharashtra

Question 24

Areas worst affected by soil erosion

Answer 24

Badlands of the Chambal and Yamuna rivers

2) The piedmont zone of the western Himalayas
3) The Chotanagpur plateau region
4) The Tapi-Sabarmathi valley region in Gujarat
5) The Regur area of Maharashtra
6) The dry areas of Rajasthan, Gujarat and Haryana

Question 25

What is soil consevation?

Answer 25

The protection of topsoil from erosion, over usage and acidification

Question 26

Where is terrace farming practiced?

Answer 26

South-East Asia and Japan and the USA

Question 27

What is the plantation of trees in several rows to check wind erosion also known as?

Answer 27

Shelter belts

Question 28

Where is contour ploughing practiced?

Answer 28

Japan, China and some South-East Asian countries

Question 29

The gullies made in the soil are plugged with deposition of ………………………. during heavy rains

Answer 29

silt

Question 30

Shelter Belts can be created in ……………………….

Answer 30

Dessert Regions