Chapter 12: Improvement in Food Resources Assertion-Reason Questions | science Class 9 CBSE

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Chapter 12: Improvement in Food Resources Assertion-Reason Questions | science Class 9 CBSE | ByteNotes.in

Assertion-Reason

Check the statement and reason

A-R

Question 1

Logic Check

Assertion (A): India needs to increase food production efficiency rather than land area. Reason (R): India has already intensively cultivated most of its arable land.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 2

Logic Check

Assertion (A): Green and white revolutions helped increase food and milk production. Reason (R): These revolutions promoted sustainable and environmentally safe practices.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 3

Logic Check

Assertion (A): Crop variety improvement helps in obtaining high yields. Reason (R): Improved crop varieties have characteristics like disease resistance and better response to fertilizers.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 4

Logic Check

Assertion (A): Hybridisation is one of the methods to improve crop varieties. Reason (R): Hybridisation includes crossing of similar species only.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 5

Logic Check

Assertion (A): Short duration crop varieties are preferred in modern farming. Reason (R): They reduce crop production costs and allow for multiple cropping in a year.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 6

Logic Check

Assertion (A): Dwarf varieties of cereals are preferred for high yield. Reason (R): Dwarf plants consume less nutrients and are easier to harvest.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 7

Logic Check

Assertion (A): Macro-nutrients are needed by plants in large quantities. Reason (R): Carbon, hydrogen, and oxygen are examples of micronutrients.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 8

Logic Check

Assertion (A): Continuous use of chemical fertilizers improves soil fertility. Reason (R): Fertilizers increase organic content in soil over time.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 9

Logic Check

Assertion (A): Vermicompost uses earthworms to improve decomposition. Reason (R): Earthworms speed up the breakdown of organic waste into manure.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 10

Logic Check

Assertion (A): Organic farming promotes sustainable agriculture. Reason (R): It avoids synthetic chemicals and uses natural manures and bio-agents.

Reasoning Options

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Chapter sections

Chapter 12: Improvement in Food Resources | Assertion-Reason

Assertion (A): India needs to increase food production efficiency rather than land area. Reason (R): India has already intensively cultivated most of its arable land.

Assertion (A): Green and white revolutions helped increase food and milk production. Reason (R): These revolutions promoted sustainable and environmentally safe practices.

Assertion (A): Crop variety improvement helps in obtaining high yields. Reason (R): Improved crop varieties have characteristics like disease resistance and better response to fertilizers.

Assertion (A): Hybridisation is one of the methods to improve crop varieties. Reason (R): Hybridisation includes crossing of similar species only.

Assertion (A): Short duration crop varieties are preferred in modern farming. Reason (R): They reduce crop production costs and allow for multiple cropping in a year.

Assertion (A): Dwarf varieties of cereals are preferred for high yield. Reason (R): Dwarf plants consume less nutrients and are easier to harvest.

Assertion (A): Macro-nutrients are needed by plants in large quantities. Reason (R): Carbon, hydrogen, and oxygen are examples of micronutrients.

Assertion (A): Continuous use of chemical fertilizers improves soil fertility. Reason (R): Fertilizers increase organic content in soil over time.

Assertion (A): Vermicompost uses earthworms to improve decomposition. Reason (R): Earthworms speed up the breakdown of organic waste into manure.

Assertion (A): Organic farming promotes sustainable agriculture. Reason (R): It avoids synthetic chemicals and uses natural manures and bio-agents.

Unlock all Assertion-Reason Questions