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Hydroponics is a technique of growing crops without__________________

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Hydroponics is a technique of growing crops without__________________

(a) Water

(b) Air

(c) Soil

(d) Sunlight

I got this question at a job interview.

This question is from Land Resources topic in chapter Natural Resources of Energy Management

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The correct answer is (c) Soil

For explanation I would say: Hydroponics is the technique of growing plants in a soil less medium, or an aquatic based environment. Hydroponics is a subset of hydro culture. Hydroponic growing uses mineral nutrient solutions to feed the plants.

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