Advertisements
Advertisements
प्रश्न
Soil conservation measures are mainly aimed at protecting one of the following?
पर्याय
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.
APPEARS IN
संबंधित प्रश्न
Explain how soil is formed.
Name any four agents of erosion.
What is meant by the terms ‘soil erosion’ and ‘soil conservation’?
Read the following statements with reference to the soil.
(i) Weathering is a very fast process of soil formation.
(ii) Percolation of water is faster in sandy soils.
(iii) Loamy soil contains only sand and clay.
(iv) Topsoil contains the maximum amount of humus.
Choose the correct statements from the above.
Unscramble the following jumbled word related to soil.
How can a farmer convert acidic soil to neutral soil?
Locate the following zones given as boxed items in Figure 9.1 which shows a diagram of the soil profile.
Topsoil, Subsoil, C-horizon, Bedrock
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.
