MEDIUM
7th CBSE
IMPORTANT
Earn 100

Why does clayey soil have a very good water-holding capacity? Explain.

Important Questions on Soil

HARD
7th CBSE
IMPORTANT
What are the properties of soil?
MEDIUM
7th CBSE
IMPORTANT
Alex is a soil specialist, and he sells manure best suited for wheat. He goes to a village where farmers are planning to sow wheat which grows best in a clayey and loamy soil. He tests the soil sample and finds that the soil is more suitable for the growth of cotton rather than wheat. He tells the villagers about this despite knowing that they will not buy his manure.
(a) Why clayey-loamy soil is preferred for growing wheat?
(b) Which value is shown by Alex?
HARD
7th CBSE
IMPORTANT
What is meant by soil profile? Draw a sketch of the soil profile and label the various layers.
HARD
7th CBSE
IMPORTANT
Write any five features of clayey soil.
HARD
7th CBSE
IMPORTANT
What do you mean by soil erosion? What are the main causes of soil erosion? How can we prevent soil erosion?
MEDIUM
7th CBSE
IMPORTANT

(a) Why is the percolation rate of water is highest in sandy soil?

(b) 200 ml of water takes 20 minutes to percolate completely in a particular soil. Calculate the percolation rate of water in this soil.

MEDIUM
7th CBSE
IMPORTANT
To make roads, people break large rocks into smaller ones. Can this be called weathering of rocks?
HARD
7th CBSE
IMPORTANT
Explain why we cannot make pots, toys and statues with sand and can make these with clay.