Question

5 Which of these has the smallest sized particles

a Sand
b Silt
c Clay
d Grave

6 The soil having highest humus content is

a Laterite soil
b Mountain soil
c Alluvial soil
d Black soil

7 In which horizon of soil more amount of minerals are found

a A horizon
b B horizon
c C horizon
d R horizon​

Answer 1

$\sf \: \bf\underline{Tick \: the \: correct \: answer :}$

(1) This soil is suitable for plant growth.

(a) Clayey

(b) Sandy

(c) Loamy ✓

(d) Rócky

Reason : The best topsoil for growing plants is Loamy type of soil. It is a type of soil which contains sand, clay and slit.

(2) Which of the following is not a weathering agent?

(a) Wind

(b) Water

(c) Animal

(d) Flower ✓

Reason : The breaking down of rocks is called Weathering. They are done by Wind, Water, Animals and Climate.

(3) This soil has good water holding capacity.

(a) Sand

(b) Clay ✓

(c) Slit

(d) Loam

Reason : Clay particles, being much smaller, pack tightly together. But they are heavy as they hold more water.

(4) Sandy soil is not good for plant growth because it :

(a) cannot hold water ✓

(b) have poor aeration

(c) have poor drainage

(d) have large particle size

Reason : Sandy tend to be light, well aerated and rather dry. And for plant growth water is very important.

(5) Which of these has the smallest sized particles ?

(a) Sand

(b) Silt

(c) Clay ✓

(d) Grave

Reason : Clayey soil has the smallest sized particles.

(6) The soil having highest humus content is

(a) Laterite soil

(b) Mountain soil ✓

(c) lluvial soil

(d) Black soil

Reason : Mountain soil has the highest humus content.

(7) In which horizon of soil more amount of minerals are found in

(a) A horizon ✓

(b) B horizon

(c) C horizon

(d) R horizon

Reason : The uppermost horizon or A Horizon contains more amount of minerals and humus.

Answer 2

Answer:

$\huge\sf\underline\blue{Answer}$

(1) This soil is suitable for plant growth.

(a) Clayey

(b) Sandy

(c) Loamy

(d) Rócky

(2) Which of the following is not a weathering agent?

(a) Wind

(b) Water

(c) Animal

(d) Flower

(3) This soil has good water holding capacity.

(a) Sand

(b) Clay

(c) Slit

(d) Loam

(4) Sandy soil is not good for plant growth because it :

(a) cannot hold water

(b) have poor aeration

(c) have poor drainage

(d) have large particle size

(5) Which of these has the smallest sized particles ?

(a) Sand

(b) Silt

(c) Clay

(d) Grave

(6) The soil having highest humus content is

(a) Laterite soil

(b) Mountain soil

(c) lluvial soil

(d) Black soil

(7) In which horizon of soil more amount of minerals are found in

(a) A horizon

(b) B horizon

(c) C horizon

(d) R horizon