please explain aeroponic and hydroponic processes.

Hydroponics is the art of growing plants in a nutrient solution in the absence of soil. Since the plant roots are exposed to a limited amount of the solution, there are chances that the concentrations of oxygen and other minerals in the plant roots would reduce. Therefore, in studies involving mineral nutrition hydroponics are used.

Aeroponics is the art of growing plants with out any medium, plants are sprayed with mist having nutrients. This technique is also used in studying plant mineral nutrition.