Read the following statements and choose the correct one from the options given below. (i) Hydroponics is the practice of growing plants in nutrient-enriched water, without soil. (ii) Hydroponics has been successfully employed as a technique for the commercial production of vegetables such as tomato. (iii) Hydroponics methods require purified water and non-mineral nutrient salts. (iv) The nutrient solutions should no

Step-by-step solution

The technique of growing plants in a nutrient solution is known as hydroponics. The essence of all these methods involves the culture of plants in a soil-free, defined mineral solution. These methods require purified water and mineral nutrient salts. Hydroponics has been successfully employed as a technique for the commercial production of vegetables such as tomato, seedless cucumber and lettuce. It must be emphasised that the nutrient solutions must be adequately aerated to obtain the optimum growth.