Soil Erosion

Q.

What are the causes of soil erosion?

Q. S1: Soil erosion affects the economy. S2: Soil is an important natural resource because agriculture depends on soil quality. Based on the statements given, select the most appropriate option from the following:

1. S1 is true, S2 is true; S2 is the explanation of S1
2. S1 is true, S2 is true; S2 is not the explanation for S1
3. S1 is true, S2 is false
4. S1 is false, S2 is true

Q. What is gully erosion found in the Chambal basin called?

1. canyon
2. valley
3. ravine
4. rip

Q. Select the factors that cause soil erosion.

1. Deforestation
2. Afforestation
3. Crop rotation
4. Overgrazing
5. Construction
6. Mining
7. Glaciers
8. Mulching
9. Rivers
10. Sunlight

Q. Which of the following has led to an increase in pollution, sedimentation, flooding, and loss of land fertility?

1. Formation of soil by weathering
2. Increasing the quality of soil by adding fertilisers
3. Transportation of soil from one place to another by wind
4. Denudation of soil cover and its washing down

Q. The removal of thin layers of soil, one after another, over a period of time is known as gully erosion.

1. True
2. False

Q. The removal of top soil by natural agents is termed as ___.

1. Flowing of soil
2. Soil erosion
3. Soil conservation
4. Ploughing

Q. Which of these could lead to gully erosion?

1. Sparse ground cover caused by land clearing, over-grazing, repeated cultivation, fire, rabbits, feral animals or drought.
2. Stable soils in drainage lines.
3. Increased runoff caused by low levels of vegetation cover and/or poor soil infiltration.
4. Intense rainfall.

Q. What is the process by which the thin layer of soil required for plant growth and sustenance of various lifeforms gets destroyed due to deforestation, wind, and rainfall known?

1. Soil formation
2. Soil erosion
3. Soil degradation
4. Soil denaturation

Q. are made along points of the same height on mountain slopes using natural materials such as stones, grass, and soil in order to prevent soil erosion by the action of running water.

1. Fences
2. Trenches
3. Barriers
4. Roads

Q. The rivers, sea waves and wind are the natural agents that cause soil erosion. Why has the soil erosion increased?

1. The wind blows too fast
2. Water levels have increased in the rivers
3. Deforestation
4. Shifting cultivation

Q. Which of the following has led to an increase in pollution, sedimentation, flooding, and loss of land fertility?

1. Formation of soil by weathering
2. Increasing the quality of soil by adding fertilisers
3. Transportation of soil from one place to another by wind
4. Denudation of soil cover and its washing down

Q. X visits his drought hit village and realises that the ground water level has gone down. The soil has lost its moisture content. He concludes that this degradation of soil is due to soil erosion. What are the probable factors that has led X to conclude the prevalence of soil erosion?

1. Loss of soil fertility
2. Vegetation cover has dried and led to drought
3. Change in the color of soil and texture
4. Hybrid crops are grown in the field

Q. Give examples of recycling non-renewable resource

Q. what is resource planning and why is it necessary

Q.

Why is step farming common in hills?