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प्रश्न
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.
पर्याय
(ii) and (iv)
(i) and (iii)
(ii) and (iii)
(i) and (ii)
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उत्तर
(ii) and (iv)
Explanation:
Weathering is the breaking down of huge pieces of rocks into smaller pieces by the action of natural forces such as water, glaciers, wind and roots of plants, etc. It takes hundreds of years to produce a few centimetres of soil. So, it is a very slow process. Loamy soil is a mixture of sand, silt and clay and also has humus in it.
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\[\boxed{\text{S}}\]\[\boxed{\text{U}}\]\[\boxed{\text{H}}\]\[\boxed{\text{U}}\]\[\boxed{\text{M}}\]
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\[\boxed{\text{M}}\]\[\boxed{\text{O}}\]\[\boxed{\text{A}}\]\[\boxed{\text{L}}\]
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\[\boxed{\text{G}}\]\[\boxed{\text{I}}\]\[\boxed{\text{N}}\]\[\boxed{\text{R}}\]\[\boxed{\text{H}}\]\[\boxed{\text{E}}\]\[\boxed{\text{T}}\]\[\boxed{\text{W}}\]\[\boxed{\text{E}}\]\[\boxed{\text{A}}\]
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| Topsoil, Subsoil, C-horizon, Bedrock |
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| 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 |
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| (f) | Snails and slugs | (vi) | A horizon of moist soils |
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