Question

The charcoal culture experiment is better than the water culture experiment because
A. Plants get support
B. Problem of aeration is removed
C. Charcoal is an inert substance
D. All of the above

Answer 1

Hint: Water culture experiment is also known as hydroponics.
It is a technique in which plants are provided nutrients through solutions.
In 1860, Julius von Sachs, a german botanist demonstrated that plants could be grown in a defined solution of nutrients in the complete absence of soil.

 Complete answer: After this experiment, various water culture-based experiments were performed to improve the methods applied and it was concluded that these methods involve the cultivation of plants in soil-free can be cultivated. These methods require salts of mineral nutrient and purified water.
During these experiments, the roots of the plants were immersed in a nutrient solution, and various essential elements like nitrogen, phosphorus, potassium, calcium, etc which are necessary for plants were either removed or added or given in varying concentrations depending upon the need of the plant’s growth.
With the help of this experiment, the essential elements of specific plants were identified and their deficiency symptoms were also discovered.
Numerous commercial production of vegetables like tomato, lettuce were obtained through this experiment but water culture or hydroponics also had a few disadvantages, the plants did not have proper aeration and lack physical support.

Therefore the correct answer is (D) all of the above.

Note: To overcome these problems charcoal culture experiments were performed. Through this, the plants received physical support. Charcoal also holds air that provides aeration of medium and also charcoal is an inert substance the minerals which were required could be added.