Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q124 (NDA-II/2023) Geography › World Physical Geography Official Key

Which one of the following is an organic soil?

Result
Your answer: —  Â·  Correct: B
Explanation

Histosols are defined under the USDA Soil Taxonomy as soils that consist primarily of organic materials. The name is derived from the Greek word 'histos', meaning tissue. These soils contain a very high concentration of organic matter (typically more than 20-30% by weight) and are usually found in wetland environments like bogs, moors, and peatlands, where poor drainage inhibits the rapid decomposition of plant matter.

  • Aridisols: These are mineral soils of dry/arid regions with very low organic content.
  • Oxisols: These are highly weathered soils of tropical and subtropical regions, characterized by iron and aluminum oxides.
  • Vertisols: These are clay-rich soils known for significant shrinking and swelling (e.g., India's Black Cotton Soil).

Since Histosols are the only order characterized by dominant organic horizons, Option B is the correct answer.

How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
33%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

CDS-I · 2020 · Q118 Relevance score: 5.33

Which one of the following soils is characterized by very high content of organic matter?

CDS-I · 2017 · Q40 Relevance score: 4.57

Which one of the following with regard to Aridisol, one of the soil orders, is not correct?

CDS-II · 2019 · Q40 Relevance score: 3.29

Match List-1 with List-11 and select the correct answer using the code given below the lists: List-I (soil type) I. OxisOLS II. Vertisols III. Histosols IV. Entisols List-11 (Major Chanrdelistiral 1 Very rids in organic matter2 2 Soil lacking horizons 3 Very old and highly weathe- red 4 Rich in day content and highly basic Code: I II III IV

CDS-I · 2022 · Q55 Relevance score: 3.26

Match List I with List II and select the correct answer using the code given below the lists : List I List II (Soil Type) (Salient Characteristic) A. Entisols 1. Soils having weakly or quickly developed horizons B. Inceptisols 2. Weakly developed soils with no horizons 1 C. Histosols 3. These soils are very old and highly weathered D. Oxisols 4. These soils have very high quantity of organic matter in the upper layers Code : A B C D

CDS-II · 2021 · Q66 Relevance score: 2.80

Inceptisols, Entisols, Vertisols and Mollisols are orders of which one of the following ?