Soil Erosion and Its Prevention

Q.

What are the important features of arid soil?

Q.

Write any two reasons for land degradation today.

Q.

How is overgrazing responsible for land degradation in Gujarat?

Q.

Why is soil erosion relatively less in dense forests as compared to barren, open fields?

Q. Arid soil is formed in western Rajasthan. Its main features are:
I. Arid soils range from red to yellow in colour.
II. They are generally sandy and saline.
III. Humus and moisture content is very low due to dry climate and faster evaporation.
IV. Thorny bushes are found in this region.

1. Only I, II and III
2. Only II and III
3. Only I, II and IV
4. Only II, III and IV

Q.

Write the main features of arid soil -

Q.

Read the following statements and give the appropriate terms for each of them.

(a) The process of breakdown of rocks by the action of wind, water, and sunlight.

(b) Removal of topsoil during heavy rains or strong winds.

(c) Accumulation of wastes in the soil generated by human activity alters the features of the soil.

(d) The process of movement of water into deeper layers of soil.

Q.

Crop rotation is a better method of retaining soil fertility than adding fertilisers. How?

Q. What is soil erosion ?

Q. State two methods of controlling the erosion of soil caused by running water.

Q.

What are the different ways to prevent soil erosion?

Q. Which is responsible for sheet erosion?

1. Tree
2. Air
3. Water
4. None of these

Q. Soil erosion caused by winds is high in the state of ______.

1. Madhya pradesh
2. Gujarat
3. Rajasthan
4. Andhra pradesh

Q. Which of the following is responsible for soil erosion in farms?

1. Rivers and wind work
2. Defective methods of farming
3. Flowing water
4. Moving glaciers

Q. Ravines is a common term used in Chambal valley for __________.

1. Sheet erosion
2. Wind erosion
3. Gully erosion
4. Rill erosion

Q. State the geographic term for each of the following processes:
i. The process by which soluble minerals dissolve in rain water and percolate to the bottom, leaving the top soil infertile.
ii. The process by which rain water, flowing in definite paths, removes the top soil, thus causing deep cuts to the surface of the land.

Q. Answer the following questions in a sentence each:
Coastal erosion is more severe along the West Coast of India.
Why?

Q. Which one is a gaseous agent of erosion?

1. All of above
2. Temperature
3. Wind
4. Water

Q. What are the agents of eroded materials?

1. Sea waves
2. Groundwater
3. Wind
4. All of above

Q. What are the factor responsible for erosional transportational and depositional work?

1. Slope of land
2. All of above
3. Volume of water flowing in the river
4. Volume of sediments in the river

Q. The sand particles in Indian Desert are uniformly rounded because of :

1. Transportation work of wind
2. Depositional work of wind
3. High wind velocity and transportation work
4. High wind velocity and friction

Q. Which one of the following is responsible for the soil erosion in farms?

1. Rivers and wind work
2. Defective methods of farming
3. Moving glaciers
4. Flowing water