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प्रश्न
What are the components of topsoil?
उत्तर
The topmost layer is the topsoil (Layer D) which consists of clay, silt, sand and humus.
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संबंधित प्रश्न
Give geographical reason:
Soil is a very important resource.
Give geographical reason:
There is a need for soil conservation.
What is meant by the terms ‘soil erosion’ and ‘soil conservation’?
Soil conservation measures are mainly aimed at protecting one of the following?
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.
Rajasthan is a desert state in India. Once while travelling to Rajasthan by train, Boojho observed several streams and rivulets of rainwater 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 |
Gardeners gently dig up the soil around the roots of garden herbs (plants) frequently. Give reasons.
Several terms related to soil are hidden in the squares given in Figure 9.2. Spot them and make a list. Two examples are given for you.
