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प्रश्न
Soil conservation measures are mainly aimed at protecting one of the following?
विकल्प
Plants
Topsoil
Subsoil
Soil organisms
उत्तर
Topsoil
Explanation:
Topsoil is rich in humus which is dark brown in colour and consists of decaying remains of plants and animals. Humus improves the texture of the soil and provides nutrients for plant growth. So, it is the most fertile region and soil conservation measures are mainly aimed at protecting topsoil. If topsoil is protected or conserved then subsoil is also conserved because it lies below the topsoil.
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संबंधित प्रश्न
Distinguish between the following pair
Soil erosion and soil conservation
Name the various methods of conserving soil.
Why is soil conservation important? Give three reasons.
Explain any two methods of soil conservation briefly.
The photograph shows a framing method that helps in controlling soil erosion.
- What is this farming method called
- Mention any two other methods that help in controlling soil erosion.
Unscramble the following jumbled word related to soil.
Unscramble the following jumbled word related to soil.
A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper. He could not dig beyond a depth of 5 feet. Provide a suitable scientific explanation.
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 |
Gardeners gently dig up the soil around the roots of garden herbs (plants) frequently. Give reasons.
