Replenishment of the Nutrients in the Soil

IMPORTANT

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

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IMPORTANT

Chemical fertilizers are useful for crop production, but they can cause environmental pollution. Learn about organic farming, uses of manures and biofertilizers.

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What kind of soil is good for plants and how its fertility can be retained?

(Clue: Manuring)

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Which is the most appropriate soil for plants?

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What are the things we could see in the soil?

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Which of the following can use molecular nitrogen as nutrient?

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

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Give one-word answer.

Which gas is changed into its useful form by the roots of the pea and bean plants? 

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_____ bacteria convert the atmospheric nitrogen into nitrates.

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

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

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_____ is responsible for making the soil fertile.

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Name the following:
The uppermost layer of the soil.

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

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Soil is formed by breaking down of _____ .

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State an advantage of nitrogen fixation.

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Soil provides us with food, clothing and shelter.

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

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How can we conserve the soil?  

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List the uses of soil.   

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We do not depend on soil.