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Hydroponics is a successful technique of...

Hydroponics is a successful technique of growing plants but most of the crops are still grown on land ? Why ?

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1. The technique of growing plants in nutrient solution or hydroponics requires purified water and mineral nutrient salts. It is employed in commercial production of vegetables like tomato, seedless cucumber etc.
2. But the nutrient solution must be sufficiently aerated for optimum growth and minerals must be continuously added in the solution. These activities are not needed for growing plants in the soil.
3. Further the technique is more expensive and may not be feasible to feed a large population.
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