What does the given experimental set-up depict?
Choose the correct option.

What is hydroponics?

Carefully observe the following figure.
$(a)$ Name the technique shown in the figure and the scientist who demonstrated this technique for the first time.
$(b)$ Name at least three plants for which this technique can be employed for their commercial production.
$(c)$ What is the significance of the aerating tube and feeding funnel in this setup?

Who demonstrated that plants could be grown to maturity in a defined nutrient solution in the absence of soil?

Hydroponics has been shown to be a successful technique for growing plants. Yet,most crops are still grown on land. Why?

Major disadvantages of hydroponics include