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Soil

Q. With refer...

Question

Q. With reference to Soil Profile, consider the following statements:

Which of the statements given above is/are correct?

A

1 only

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B

2 and 3 only

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C

1 and 3 only

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D

2 only

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Solution

The correct option is C 1 and 3 only
Explanation:

Statement 1 is correct:O horizon is the upper layer of the topsoil which is mainly composed of organic materials

Statement 2 is incorrect: A horizon is the part of topsoil. In this layer, organic matter is mixed with mineral matter. B-Horizon is the subsurface horizon, present just below the topsoil and above the bedrock.

Statement 3 is correct: C Horizon is made up of broken bedrock and is devoid of any organic matter. Weathered parent material accumulates in this layer, i.e. the parent material in sedimentary deposits.

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Similar questions

Q.  With respect to soil profile consider the following statements:

1.Horizon A is the top most layer and is mostly made up of decayed organic matter.
2.Horizon B is the Zone of transition between Horizon A and Horizon C.
3.Horizon C is composed of loose parent material and demarcates the final stage in soil formation.

Select the correct answer from the following:

Q. Given figure represents the organic soil profiile, showing different layers/horizons of soil.
Which of the folllowing statements regarding the soil profile are not true?
(i)maximum roots oof plants are found n horiizon A.
(ii) Maximum nutrients are present in horizon B.
(iii) Horizon B contains party weathered rocks
(iv) Horizon C contains roots of the pllants and mineral salts.

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. B-horizon is the most fertile part of the soil. ( )
2. Overgrazing leads to soil erosion. ( )
3. A fertile soil is rich in humus. ( )
4. Bedrock lies above the subsoil. ( )
5. Topsoil is soft, porous and retains water. ( )

Q. Locate the following zones given as boxed items in figure which shows a diagram of soil profile.

Topsoil, Subsoil, C-horizon, Bedrock

Q. Humus and the smallest particles of rock form the

(a) A-horizon
(b) B-horizon
(c) C-horizon
(d) bedrock

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