Critical Thinking Questions: Soils in India

Table of Contents
1. Type I
2. Type II
3. Type III
4. Type IV
5. Type V
6. Type VI
7. Type VII
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Type I

Q1: Soil is considered a renewable resource mainly because:
(a) It is formed from rocks
(b) It can be regenerated through natural processes
(c) It is found everywhere
(d) It is rich in minerals

Q2: The most fertile layer of soil is known as:
(a) Subsoil
(b) Bedrock
(c) Topsoil
(d) Parent rock

Q3: Which factor does NOT influence soil formation?
(a) Temperature
(b) Parent rock
(c) Decomposers
(d) Latitude

Type II

Q4: Fertile soil must contain:
A. Organic matter
B. Adequate moisture
C. Sufficient depth
D. Excess salts
(a) A, B and C
(b) B, C and D
(c) A and D
(d) C and D

Q5: Which characteristics are associated with alluvial soil?
A. River deposition
B. High fertility
C. Sandy texture only
D. Suitable for multiple crops
(a) A, B and D
(b) B and C
(c) A and C
(d) C and D

Q6: Which features distinguish khadar soil from bangar soil?
A. Annual deposition
B. Higher fertility
C. Presence of kankar
D. Location in floodplains
(a) A, B and D
(b) B and C
(c) A and C
(d) C and D

Type III

Analogy Based

Q7: Black soil : Cotton :: Alluvial soil :
(a) Tea
(b) Rice
(c) Rubber
(d) Coffee

Q8: Laterite soil : Leaching :: Black soil :
(a) Erosion
(b) Cracking
(c) Waterlogging
(d) Salinity

Q9: Red soil : Iron oxide :: Black soil :
(a) Lime
(b) Clay
(c) Humus
(d) Sand

Type IV 

Assertion-Reason

Q10: (A) Black soil is suitable for cotton cultivation.
(B) Black soil has high moisture-retaining capacity.
(a) (B) contradicts (A)
(b) (B) is the reason for (A)
(c) (A) is true but (B) is false
(d) (A) and (B) are independent

Q11: (A) Laterite soil is generally infertile.
(B) Heavy rainfall causes leaching of nutrients.
(a) (B) contradicts (A)
(b) (B) is the reason for (A)
(c) (A) is false but (B) is true
(d) (A) and (B) are independent

Q12: (A) Red soil requires fertilisers for cultivation.
(B) Red soil is deficient in nitrogen and organic matter.
(a) (B) contradicts (A)
(b) (B) is the reason for (A)
(c) (A) is true but (B) is false
(d) (A) and (B) are independent

Type V 

Application-Based

Q13: A farmer facing cracking of soil during summer is most likely cultivating on:
(a) Alluvial soil
(b) Laterite soil
(c) Black soil
(d) Desert soil

Q14: Which soil type would be most suitable for tea and cashew plantations?
(a) Red soil
(b) Laterite soil
(c) Desert soil
(d) Saline soil

Q15: A floodplain receiving fresh sediments every year will mainly develop:
(a) Bangar soil
(b) Desert soil
(c) Khadar soil
(d) Laterite soil

Type VI

Soil Erosion & Conservation

Q16: The washing away of topsoil in thin layers over a large area is called:
(a) Gully erosion
(b) Rill erosion
(c) Sheet erosion
(d) Stream erosion

Q17: Wind erosion is most severe in which region of India?
(a) Western Ghats
(b) Eastern Coastal Plains
(c) Arid Rajasthan
(d) Brahmaputra Valley

Q18: Which method is most effective in reducing soil erosion on hill slopes?
(a) Strip cropping
(b) Terrace farming
(c) Shelter belts
(d) Plugging of gullies

Type VII

Odd One Out / Incorrect Statement

Q19: Identify the odd one out:
(a) Gully erosion
(b) Sheet erosion
(c) Rill erosion
(d) Fertilisation

Q20: Which of the following is NOT a cause of soil erosion?
(a) Deforestation
(b) Overgrazing
(c) Afforestation
(d) Heavy rainfall