1. In which type of soil erosion, the soil matrix is lost but remains undetected for long period?
- Gully erosion
- Stream bank erosion
- Rill erosion
- Sheet erosion
Answer: Sheet erosion
2. Sedimentation allows separation of:
- Soluble particles
- Insoluble particles
- Organic compounds
- Gaseous molecules
Answer: Insoluble particles
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3. Water erosion can be minimized by:
- Removing vegetation cover
- Disturbing soil frequently
- Cover cropping
- Over-irrigation
Answer: Cover cropping
4. Which one of the following is the first stage of water erosion?
- Rill erosion
- Sheet erosion
- Splash erosion
- Gully erosion
Answer: Splash erosion
5. Splash erosion is the first stage of water erosion where:
- Water flows down the land removing topsoil
- Raindrops hit exposed soil and displace soil particles
- Deep channels called gullies are formed
- Surface runoff detaches and transports soil particles
Answer: Raindrops hit exposed soil and displace soil particles
6. Gully erosion creates deep channels that:
- Can be removed through normal tilling
- Are 10-15 cm deep
- Are less than 30 cm deep
- Cannot be removed through normal tilling
Answer: Cannot be removed through normal tilling
7. Gully erosion creates deep channels that:
- Can be removed through normal tilling
- Are 10-15 cm deep
- Are less than 30 cm deep
- Cannot be removed through normal tilling
Answer: Cannot be removed through normal tilling
8. Red soils are suitable for which of the following crops?
- Rice and wheat
- Sugarcane and tea
- Cotton and pulses
- Jute and coffee
Answer: Cotton and pulses
9. Which stage of water erosion represents Slash erosion?
- Second
- Fourth
- First
- Third
Answer: First
10. Which factor does NOT cause weathering and erosion?
- Water
- Wind
- Pressure
- Plants
Answer: Pressure
11. Which stage of water erosion represents Slash erosion?
- Second
- Fourth
- First
- Third
Answer: First
12. The presence of which clay mineral leads to high phosphorus fixing capacity in red soils?
- Kaolinite
- Montmorillonite
- Vermiculite
- All of above
Answer: Kaolinite
13. How is sheet erosion caused?
- By surface water runoff
- By raindrop splash
- By downward cutting of streams
- By wind-blowing soil particles
Answer: By surface water runoff
14. How does lack of vegetation cover increase erosion?
- Roots bind the soil
- Plants reduce wind velocity
- Leaves reduce raindrop impact
- All of the above
Answer: All of the above
15. In the process of erosion, the removal of materials by solution is called
- Corrasion
- Attrition
- Corrosion
- Sapping
Answer: Corrosion
16. Weathering and erosion lead to:
- Formation of soil
- Build-up of sediments
- Joining of rock particles
- Cementation of minerals
Answer: Formation of soil
17. Gully erosion is an advance stage of?
- Rill erosion
- Splash erosion
- Sheet erosion
- Wind erosion
Answer: Rill erosion
18. Which of the following is NOT an impact of excessive erosion on agricultural
productivity?
- Loss of organic matter
- Exposure of nutrient-rich topsoil
- Increased water infiltration in soil
- Breakdown of soil structure
Answer: Increased water infiltration in soil
19. Arable land in the irrigated zones of India is becoming saline because of ________.
- Over Grazing
- Over-Irrigation
- Heavy rainfall
- Over use of pesticides
Answer: Over-Irrigation
20. Rajasthan faces scarcity of water because it has:
- Small cultivable area
- Low population density
- Limited surface and groundwater availability
- Excessive precipitation
Answer: Limited surface and ground water availability
