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Nitrogen-fixing Nodules in Leguminous Plants

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Nitrogen-fixing Nodules in Leguminous Plants

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Questions and Answers

Why do farmers have to add manure to their fields?

To improve soil aeration

To increase soil acidity

To provide essential nutrients for plant growth (correct)

To prevent weeds from growing

What is the purpose of adding urea to the soil in glass B in the activity described?

To improve soil structure

To increase soil pH

To provide nitrogen to the plants (correct)

To add organic matter to the soil

What impact does continuous cultivation of crops have on the soil?

Enriches the soil with nutrients

Increases the organic matter content in the soil

Makes the soil poor in nutrients (correct)

Improves soil fertility

What is the source of manure used by farmers?

Decomposed plant or animal waste Signup and view all the answers

What is the main difference between fertilisers and manure?

Fertilisers are man-made inorganic salts, while manure is a natural substance obtained by the decomposition of cattle dung and plant residues. Signup and view all the answers

How does organic manure benefit soil compared to fertilisers?

Organic manure makes the soil porous due to which exchange of gases becomes easy and improves the texture of the soil. Signup and view all the answers

Why is water essential for plants?

Water is important for proper growth and development of plants. Signup and view all the answers

Where are nitrogen-fixing nodules commonly found?

In the roots of leguminous plants. Signup and view all the answers

What is one key difference between manure and fertilisers?

Manure is organic, while fertilisers are chemical-based Signup and view all the answers

Why is excessive use of fertilisers harmful to the soil?

It makes the soil less fertile and can lead to water pollution Signup and view all the answers

How does the use of manure benefit the soil?

Improves soil texture, water retaining capacity, and replenishes nutrients Signup and view all the answers

What is a method suggested in the text to replenish soil nutrients besides using manure?

Crop rotation by alternating different crops Signup and view all the answers