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Soil & Crops

Soil profiles...

Question

Soil profiles consist of three layers which are called
(a) top soil
(b) horizons
(c) subsoil
(d) bedrock

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Solution

(b) horizons
The three layers of soil (i.e., top soil, subsoil and bedrock) are called horizons.

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Question 13

Locate the following zones given as boxed items in Figure 9.1 which shows a diagram of the soil profile.

$\begin{matrix} T o p s o i l, S u b s o i l, C - h o r i z o n, B e d r o c k \end{matrix}$

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

Topsoil, Subsoil, C-horizon, Bedrock

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. Explain different horizons of soil profile.

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