Availability of water and minerals in the soil for maximum absorption by roots is in the –
(a) B-horizon
(b) C-horizon
(c) A-horizon
(d) surface of soil

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Solution

option (c).

A-horizon is the uppermost layer, it is called the topsoil. It is rich in humus and minerals and is dark in colour. This layer is soft, porous, and can retain more water. Hence, from this layer maximum absorption is done by the roots of plants.

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Question 9

Which of the following situations – ‘A’ or ‘B’ – is advantageous for absorption of water and minerals? Why?
Situation ‘A’ : Growth and branching of roots in the C-horizon.
Situation ‘B’ : Growth and branching of roots in A and B horizons.

Q. Water percolating into the soil collects over

(a) A-horizon
(b) B-horizon
(c) C-horizon
(d) none of these

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. Availability of water and minerals in the soil for maximum absorption by roots is in the-

Match the following and choose the correct option:

i. A - horizon a. Small lumps of rocks

ii. B - horizon b. Hard layer which is difficult to dig

iii. C - horizon c. Dark in colour and rich in humus

iv. R -horizon d. Less humus and more minerals, compact

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Availability of water and minerals in the soil for maximum absorption by roots is in the – (a) B-horizon (b) C-horizon (c) A-horizon (d) surface of soil

option (c). A-horizon is the uppermost layer, it is called the topsoil. It is rich in humus and minerals and is dark in colour. This layer is soft, porous, and can retain more water. Hence, from this layer maximum absorption is done by the roots of plants.

Availability of water and minerals in the soil for maximum absorption by roots is in the –
(a) B-horizon
(b) C-horizon
(c) A-horizon
(d) surface of soil

option (c).

A-horizon is the uppermost layer, it is called the topsoil. It is rich in humus and minerals and is dark in colour. This layer is soft, porous, and can retain more water. Hence, from this layer maximum absorption is done by the roots of plants.