The figure given below shows $..............$.

Give differences: Soil culture and Hydroponics.

Mention the methods to study the mineral requirements in plants.

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 the concept of hydroponics for the first time?

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