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Desired improved varieties of economical...

Desired improved varieties of economically useful crops are raised by –

A

1. Mutation

B

2. Hybridisation

C

3. Natural selection

D

4. Biofertiliser

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Knowledge Check

  • The green revolution succeeded in increasing the yield of crops mainly due to the use of I) improved varieties of the crops II) agro-chemicals III) better management practices Choose the correct option.

    A
    I and II
    B
    I and III
    C
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    D
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    A
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    B
    only on the intensity of doses drawn from it
    C
    on both (1) and (2)
    D
    neither on (1) nor on (2)

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