Self Assessment
Answer the following questions :
What is soil ?
1.
3.
4.
2. Name the soil which is formed due to high temperature and heavy rainfall with alternating wet and dry
periods. Name two states where this type of soil is found.
State some factors that determine the type of soil found in India.
What is soil erosion ? Mention two main causes of soil erosion.
5. Name the type of soil which is
(a) Useful for the cultivation of jute.
(b) Formed by decomposition of metamorphic rocks.
(C) Covers 40% of land area of India.
(a) Develops on old crystalline rocks under moderate to heavy rainfall.
(e) Alkaline in nature and contains a high proportion of salts.
6. Explain the formation of alluvial soil.
7. Name any three factors which affect the formation of soil.
8. Explain the formation of soil. Name three different forces of nature which contribute in the evolution of soil.
9. Write three characteristics each of 'Khaddar' and 'Bhangar' soil.
10. Why is laterite soil less fertile ? Give two reasons.
11. Name the soil which supports half of the population of India.
12. Why is laterite soil found in the Western Coastal region ?
13. Distinguish between :
(a) Khaddar and Bhangar soil.
(b) Soil erosion and Soil conservation.
14. Explain the following terms:
(a) Gully erosion
(b) Deforestation
(c) Soil conservation
(d) Soil erosion
ard Questions
Answers
Answer:
Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life.
2- laterite soil is formed in heavy rainfall and high temperatures.
Laterite soils are mainly found in Karnataka, Kerala, Tamil Nadu, Madhya Pradesh, and the hilly areas of Odisha and Assam. After adopting appropriate soil conservation techniques particularly in the hilly areas of Karnataka, Kerala and Tamil Nadu, this soil is very useful for growing tea and coffee.
The laterite soils develop in areas with high temperature and high rainfall. These are the result of intense leaching due to tropical rains. With rain, lime and silica are leached away, and soils rich in iron oxide and aluminium compound are left behind
Detachment and movement of topsoil or soil material from the upper part of the profile by the action of wind or running water especially as a result of changes brought about by human activity (such as unsuitable or mismanaged agricultural methods).
The agents of soil erosion are the same as the agents of all types of erosion: water, wind, ice, or gravity. Running water is the leading cause of soil erosion, because water is abundant and has a lot of power. Wind is also a leading cause of soil erosion because wind can pick up soil and blow it far away.
5 - (a) alluvial soil .
(b) Red soil.
(c) alluvial soils .