CSS :: Soil Erosion and Conservation
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41. |
Over-all mineral level of soil recedes due to: |
A. |
Leaching only |
B. |
Utilization by plants |
C. |
Both (a) & (b) |
D. |
Chemical reactions |
Answer: Option C
Explanation:
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42. |
Odum has described soil erosion as: |
A. |
Soil pollution |
B. |
Creeping death of soil |
C. |
Loss of living stratum |
D. |
Loss of feeding zone |
Answer: Option A
Explanation:
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43. |
A slopy land on account of continued rainfall initially under goes: |
A. |
Rill erosion |
B. |
Gully erosion |
C. |
Sheet erosion |
D. |
All of these |
Answer: Option A
Explanation:
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44. |
The amount of soil lost to sea each year due to rainfall is around: |
A. |
3,000 million tons |
B. |
3,000,000 million tons |
C. |
3,00,00,000 million tons |
D. |
3,00,000 billion tons |
Answer: Option B
Explanation:
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45. |
The chief cause of accelerated erosion is: |
A. |
Excessive rains |
B. |
Wind storms |
C. |
Overfelling and overgrazing |
D. |
All of these |
Answer: Option C
Explanation:
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46. |
The soil erosion on slopes proceeds in the following manner: |
A. |
Gully ? Rill ? ravine |
B. |
Rill ? Ravine ? Gully |
C. |
Rill ? Gully ? Ravine |
D. |
Ravine ? Rill ? Gully |
Answer: Option C
Explanation:
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47. |
Wave erosion is more prevalent and well marked: |
A. |
Along rivers |
B. |
At the sea shore |
C. |
In water falls |
D. |
In all these places |
Answer: Option B
Explanation:
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48. |
Soil conservation is the process where: |
A. |
Sterile soil is converted into fertile soil |
B. |
Soil is aerated |
C. |
Soil erosion is allowed |
D. |
Soil is protected against loss |
Answer: Option D
Explanation:
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49. |
The plants commonly sown for crop rotation are : |
A. |
Cajanus and Dalbergia |
B. |
Cajanus and Aeschynomene |
C. |
Dalbergia and trigonella |
D. |
Trigonella and Trifolium |
Answer: Option D
Explanation:
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50. |
In dry farming initially the fertility of the land can be increased by: |
A. |
Agrostology |
B. |
Basin listing |
C. |
Growing grazing fields |
D. |
Animal husbandry |
Answer: Option D
Explanation:
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