Question

how hydroponic is useful for crop cultivation?

Answer 1

The word hydroponics refers to growth of plants in water
it is also called soilless agriculture
you can see the schematic diagram of hydroponics with the attachement

major advantages of hydroponics

* it provide desired nutrient environment

* labour for watering land can be avoided

* tilling is not necessary

*proper aeration is possible

Answer 2

hydroponics refers to soli-less culture of plants as it is growing plants without soil so this technique can be used in those area where soil is less fertile or insufficient in addition it can be used to study different stage of plants.
2.as this technique does not use soil and hence no artificial fertilizer are required which is good for environment.

hope it helps