Q.

Hydroponics is a method of culture of plants without using –

A. water
B. light
C. sand
D. soil
Answer» D. soil
Explanation: Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. Plants are grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, mineral wool, expanded clay pebbles or coconut husk.
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Biology (GK)

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