Hydroponics are of three types: $A$,a film system,and $B$. Choose the correct pair from the options given below.

  • A
    $A-$ in vitro; $B-$ tube system
  • B
    $A-$ tube system; $B-$ tank system
  • C
    $A-$ tank system; $B-$ aeroponics
  • D
    $A-$ plant tissue culture; $B-$ tube system

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Major disadvantages of hydroponics include

Cultivation by sand culture is also called

Growing plants in a nutrient solution,known as hydroponics:

State the uses of hydroponics.

$A$: Jar for nutrient solution culture contains a split cover with holes which hold a bent tube for aeration.
$R$: Regular aeration of culture solution is necessary for proper growth and activities of roots.

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