NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1238 - 1242 of 2028

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Question number: 1238

» Biology » Food Production and Management

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MCQ▾

Question

A method of growing different crops alternately on the same land is called:

Choices

Choice (4)Response

a.

Fallow field

b.

Mixed cropping

c.

Crop rotation

d.

Multiple cropping

Question number: 1239

» Biology » Food Production and Management

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Match List-Ⅰ List-Ⅱ▾

Question

Match the following with correct answers.

List-Ⅰ (Group I)List-Ⅱ (Group II)

(A)

White revolution

(i)

Petroleum production

(B)

Yellow revolution

(ii)

Dairy, milk production

(C)

Black revolution

(iii)

Agriculture production

(D)

Green revolution

(iv)

Oil seed production

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (iii)
  • (ii)
  • (i)
  • (iv)

b.

  • (ii)
  • (iv)
  • (iii)
  • (i)

c.

  • (iv)
  • (ii)
  • (iii)
  • (i)

d.

  • (ii)
  • (iv)
  • (i)
  • (iii)

Question number: 1240

» Biology » Food Production and Management

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MCQ▾

Question

The science of improving a population by controlled breeding to increase the occurrence of desirable heritable characteristics is called:

Choices

Choice (4)Response

a.

Genetic engineering

b.

Crop improvement

c.

Eugenics

d.

Plant breeding

Question number: 1241

» Biology » Food Production and Management

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MCQ▾

Question

Which are the common weeds which grow with the crops?

Choices

Choice (4)Response

a.

Chenopodium

b.

Wild out

c.

Grass

d.

All a. , b. and c. are correct

Question number: 1242

» Biology » Food Production and Management

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MCQ▾

Question

Which are the major decline of soil fertility?

I. Unscientific rotation of crops

II. Extensive and excessive use of chemical fertilizers

III. Too much use of chemical pesticides

Find the correct statement/statement (s).

Choices

Choice (4)Response

a.

I and III only

b.

II and III only

c.

I, II and III only

d.

I and II only

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