Replenishment of the Nutrients in the Soil
Replenishment of the Nutrients in the Soil: Overview
This topic covers concepts, such as, Role of Nitrogen in Plants, Replenishment of Nutrients in the Soil, Biological Nitrogen Fixation by Rhizobium, Soil Nutrients, Fertilizers & Manures etc.
Important Questions on Replenishment of the Nutrients in the Soil
Chemical fertilizers are useful for crop production, but they can cause environmental pollution. Learn about organic farming, uses of manures and biofertilizers.

What kind of soil is good for plants and how its fertility can be retained?
(Clue: Manuring)

Which is the most appropriate soil for plants?

What are the things we could see in the soil?

Which of the following can use molecular nitrogen as nutrient?

These are necessary for healthy growth of plants and are found in clay and sand.

Give one-word answer.
Which gas is changed into its useful form by the roots of the pea and bean plants?

_____ bacteria convert the atmospheric nitrogen into nitrates.

Explain the reason for calling soil the 'Skin of the Earth'.

Plants get _____ from the soil with the help of bacteria.

_____ is responsible for making the soil fertile.

Name the following:
The uppermost layer of the soil.

Name the gas present in air which cannot be used directly by animals

Soil is formed by breaking down of _____ .

State an advantage of nitrogen fixation.

Soil provides us with food, clothing and shelter.

Name a plant (Mendel used it for his experiments) which has Nitrogen fixing Rhizobium bacteria in its roots.

How can we conserve the soil?

List the uses of soil.

We do not depend on soil.
