Soil Erosion and Conservation

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. 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. Some regions follow contour farming. This method is useful for ___ and ____.

1. Soil conservation
2. Wise use of water for the crops
3. Reduce soil erosion
4. Increase the manpower

Q. Soil conservation deals with which of the following event(s)?

1. Changing the flow of river
2. Protection of soil from soil erosion
3. Preservation of fertility of soil
4. Improving the economy

Q. Which of the following is not a way to conserve soil?

1. Mulching
2. Strip cropping
3. Overgrazing
4. Terrace farming

Q. Soil erosion can be prevented by

1. Over grazing
2. Removal of vegetation
3. Afforestation (plantation)
4. Increasing bird population

Q. Which of the following is not the purpose of multipurpose projects in India?

1. To provide irrigation
2. To produce hydroelectric power
3. To provide attraction to the tourists
4. To prevent the floods