Rotting dead organic matter in soil is
(a) clay
(b) topsoil
(c) subsoil
(d) humus

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Solution

(d) humus
The dark, soft and porous layer of soil, which is composed of decaying organic matter is known as humus.

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Question 3

Soil conservation measures are mainly aimed at protecting which of the following?
(a) Plants
(b) Topsoil
(c) Subsoil
(d) Soil organisms

Read the following statements with reference to the soil.

i) Weathering is a very fast process of soil formation.

ii) Percolation of water is faster in sandy soils.

iii) Loamy soil contains only sand and clay.

iv) Topsoil contains the maximum amount of humus.

Choose the correct statements from the above.

Q. Match the following:

List I List II

(A) (B)
A - Land use 1 - Prevent soil erosion
B - Humus 2 - Land suitable for agriculture

C - Rock dams 3 - Productive use of land
D - Arable land 4 - Organic matter deposited on topsoil

Q. Water logging can be expected in soil which is rich in

(a) sand
(b) clay
(c) silt
(d) humus

Question 4

Read the following statements with reference to soil.

(i) Weathering is a very fast process of soil formation.
(ii) Percolation of water is faster in sandy soils.
(iii) Loamy soil contains only sand and clay.
(iv) Topsoil contains the maximum amount of humus.

Choose the correct statements from the above
(a) (ii) and (iv)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (ii)

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Rotting dead organic matter in soil is (a) clay (b) topsoil (c) subsoil (d) humus

(d) humus The dark, soft and porous layer of soil, which is composed of decaying organic matter is known as humus.

Rotting dead organic matter in soil is
(a) clay
(b) topsoil
(c) subsoil
(d) humus

(d) humus
The dark, soft and porous layer of soil, which is composed of decaying organic matter is known as humus.