What do you understand by solution culture?

Solution culture : It is a method in which plants are grown in solutions.
(a) In this method, waterproof earthem vessels or
troughs are taken. These are filled with nutrient solution.
(b) To study the role and requirement of any mineral
element, a set of vessels are taken.
© In one vessel, normal nutrient solution is taken
while in others the same nutrient solution minus one of the elements (whose effect you want to study is taken).
(d) In these seedlings of same size, species are now
grown. The growth, appearance and symptoms displayed by the seedlings are then noted.