Q38 (CDS-II/2006) Geography › Indian Physical Geography › Indian soil types Answer Verified

Assertion (A) : The Gangetic plains are among the most bountiful agricultural areas of the world. Reason (R) : The Gangetic plains contain predominantly regursoil.

Both A and R are individually true and R is the correct explanation of A

Both A and R are individually true but R is not the correct explanation of A

A is true but R is false

A is false but R is true

Result

Your answer: — · Correct: C

Explanation

Assertion (A) is true as the Gangetic plains are globally recognized as highly productive agricultural regions [t2][t7]. This fertility is primarily due to the deposition of alluvium by the Ganga and its tributaries, which is rich in organic matter and rejuvenated through periodic flooding [t1][t3]. Reason (R) is false because the Gangetic plains are characterized by alluvial soils (Khadar and Bhangar), not regur soil [c2][t6]. Regur soil, also known as black cotton soil, is typical of the Deccan Trap region in the northwest Deccan plateau, covering states like Maharashtra, Gujarat, and Madhya Pradesh [c1][t4]. It is formed from the weathering of basaltic lava rocks rather than riverine deposition [c3][t4]. Therefore, while the plains are indeed bountiful, the soil responsible for this productivity is alluvium, making the reason provided scientifically incorrect.

Sources

[1] NCERT. (2022). Contemporary India II: Textbook in Geography for Class X (Revised ed.). NCERT. > Chapter 1: The Rise of Nationalism in Europe > Black Soil > p. 9
[2] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 6: Soils > Table 6.1 > p. 6
[3] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 6: Soils > 3. Black or Regur Soils > p. 11
[4] https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/alluvial-soil
[5] https://en.wikipedia.org/wiki/Major_soil_deposits_of_India

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Assertion (A) : The Gangetic plains are among the most bountiful agricultural areas of the world. Reason (R) : The Gangetic plains contain predominantly regursoil.

Explanation

SIMILAR QUESTIONS

Assertion (A) : Ganga Plain is the most densely-populated part of India. Reason (R) : Ganga is the most harnessed river of India.

Assertion (A) : The Himalayan meadows are suitable for transhumance. Reason (R) : In these areas tranport facility to move from one place to another is good.

Assertion (A) : The frequency of floods in North Indian plains has increased during the last couple of decades. Reason (R) : There has been reduction in the depth of river valleys due to deposition of silt.

Assertion (A) : In areas of intensive subsistence agriculture, animal husbandry plays an insignificant role. Reason (R) : Throughout the region, the farmers are handicapped in raising cattle due to lack of scientific methods of breeding.

Assertion (A) : The monsoonal rainfall decreases as one goes towards the west and north-west in the Ganga plain. Reason (R) : The moisture-bearing monsoonal winds go higher up as one moves up in the Ganga plain. In the context of the above two statements which one of the following is correct ?