Multiple choice

Which of the following statements is/are correct?

  1. ‘Soil profile’ consists of weathered material derived from rock.
  2. Bedrock forms the lowermost part of soil profile.

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
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A Correct answer
Explanation

‘Soil profile’ is a vertical section of the earth's crust showing the different horizons or layers. Soil profile consists of various layers of soil; horizons A, B, and C. ‘Horizon A’ refers to the upper layer of soil nearest to the surface. The layer below horizon A, of course, has to be horizon B. Litter is not present in horizon B and therefore, there is much less humus. Horizon C must be below horizon B. Horizon C consists mostly of weathered big rocks. It must be understood that ‘soil profile’ does not include the ‘bedrock’, which is non-weathered.

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