(i) What is the topmost layer of soil called?
(a) Clay
(b) Topsoil
(c) Pebbles
(d) Silt
(ii) What is the dark, organic material in the topsoil that makes it fertile?
(a) Clay
(b) Sand
(c) Humus
(d) Silt
(iii) Which natural process breaks down rocks into small pieces to form soil?
(a) Erosion
(b) Weathering
(c) Deforestation
(d) Overgrazing
(iv) What is the process of planting trees and other plants on barren lands to develop new forest-like areas called?
(a) Overgrazing
(b) Erosion
(c) Afforestation
(d) Terrace farming
(v) Why does barren land erode at a faster rate?
(a) It lacks sunlight
(b) It lacks plant cover
(c) It has too much water
(d) It is too hot
(i) Soil erosion mainly occurs due to wind and ____________.
(ii) Terrace farming is practiced in hilly regions to prevent ____________.
(iii) Bunds of stones are built along ____________ to prevent soil erosion near river banks.
(iv) Cover crops are grown on barren land to protect it from the sun and ____________.
(v) Shelter belts, rows of trees along farmland boundaries, reduce the force of strong ____________.
(i) Barren land erodes slower than land with plants.
(ii) Cover crops are not used for anything other than protecting barren land.
(iii) Soil erosion mainly occurs due to wind and stagnant water.
(iv) Terrace farming is mainly practiced in flat regions to conserve soil.
(v) Afforestation contributes to soil erosion.
1. What is soil erosion and why is it a concern? |
2. How does soil erosion affect agriculture? |
3. What are the main causes of soil erosion? |
4. How can soil erosion be prevented or controlled? |
5. What are the consequences of soil erosion on the environment? |
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