Question

In hydroponic system plant roots are submerged in a solution of dissolved____?
A. Mineral salts
B. Chemicals
C. Fertilizers
D. All the above

Answer 1

Hint:
Hydroponics is the method of cultivation of plants without using soil. Hydroponics consists of growing plants in inert media with solutions containing nutrients and oxygen. The system promotes rapid growth, higher yields, and superior quality. Whenever a plant is grown in soil, its roots are constantly seeking nutrients to sustain it. Direct exposure to water and nutrition allows plants to sustain themselves without exerting any energy.

Complete step by step answer:
Since hydroponic plants do not get nutrients from the soil we should provide an adequate amount of nutrients using fertilizers. An organic fertilizer specifically designed for cultivation in water, which allows plants to be effectively cultivated without soil. In a good hydroponic fertilizer, all the necessary nutrients and trace elements are available immediately for healthy plant growth. Hydroponic fertilizers can be available in both dry and liquid forms. Both forms have the same nutrient quantity and should be mixed with water before the cultivation of plants.
The water we use must be purified and minerals should be removed. It is because the standard nutrient solution has a fixed concentration of minerals, and if any minerals were present in the water previously and were not removed, the poor resolution will ensue. Hence, minerals and water need to be purified for plants to grow at their optimum level.
A hydroponic system can use both natural and chemical fertilizers. But there is no need to add any chemicals directly if we are using hydroponic fertilizers.

Option ‘C’ is correct

Note:
The nutrient-rich water should also have enough oxygen for the growth and respiration of roots. It should also have an adequate amount of carbon dioxide for healthy plant growth.