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प्रश्न
Why is soil conservation important? Give three reasons.
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उत्तर
Soil conservation is very important because soil consists of
mineral particles, moisture, living organisms like bacteria and earthworms, and decayed organic matter. It is one of the most important resources as human beings-depend on it, both directly and indirectly, for their basic needs of food, shelter, and clothing. It takes thousands of years for even a thin layer of soil to form.
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संबंधित प्रश्न
Distinguish between the following pair
Soil erosion and soil conservation
Name any four agents of erosion.
What are the components of topsoil?
Distinguish between contour tilling and contour bunding.
Explain any two methods of soil conservation briefly.
Soil conservation measures are mainly aimed at protecting which of the following?
Read the following statements with reference to soil.
- Weathering is a very fast process of soil formation.
- Percolation of water is faster in sandy soils.
- Loamy soil contains only sand and clay.
- Top soil contains the maximum amount of humus.
Choose the correct statements from the above.
Rajasthan is a desert state in India. Once while travelling to Rajasthan by train, Boojho observed several streams and rivulets of rain water during the journey but to his surprise, he did not see streams of water in the desert region even during rains. Help Boojho find a suitable explanation for this.
Match the animals in Column I with their natural place of dwelling (habitat) in Column II.
| Column I | Column II | ||
| (a) | Earthworm | (i) | Sand and beaches |
| (b) | Garden lizard | (ii) | Burrows in soil |
| (c) | Crab | (iii) | Deep, narrow holes in dry soils |
| (d) | Rodents | (iv) | Surface of soil |
| (e) | Scorpion | (v) | The surface of shaded moist soils |
| (f) | Snails and slugs | (vi) | A horizon of moist soils |
Several terms related to soil are hidden in the squares given in figure. Spot them and make a list. Two examples are given for you.
