Question

Technique of growing plants without soil in nutrient solution is called
a. Parthenogenesis
b. Hydroponics
c. Aquaculture
d. Tissue culture

Answer 1

Hint: Plants require specific nutrients to grow. These nutrients are divided into three categories: basic nutrients, macronutrients, and micronutrients. Each nutrient has its own significance and helps the plant to grow and provide nourishment.

Complete answer:
Plant requires specific nutrients to grow. These nutrients are divided into three categories
• Basic nutrients – these include carbon, oxygen, nitrogen and hydrogen. They are essential for the growth of the plant.
• Macro nutrients – these nutrients are required by plants in larger quantities. These include phosphorus, potassium, sulfur, calcium, and magnesium.
• Micro nutrients – they are equally important for the growth of the plant but are required in lower quantity. These include zinc, boron, iron, and manganese.

The technique of growing plants without soil in nutrient solution is called hydroponics. It is cultivation of plants in water or nutrient rich water. Hydroponics technique was discovered by Dr. William F. Gericke. The nutrient solution for hydroponics is prepared very precisely as per the requirement of the plant being grown in it. Hydroponics is widely used in vertical gardens, rooftop gardens, and living walls.

Like every other technique, hydroponics has its pros and cons, too. The pros include
• Higher yields are achieved in lower space
• Weeds are eliminated
• Nutrients can be controlled
• Soil borne pests and plant diseases are eliminated

The cons include
• Can be quite costly
• High level of expertise is required
• Requires regular attention

Hence, the correct answer is option (b).

Note: This technique has proved to be rapid and the results are obtained in a shorter period of time. The major advantage of this technique is that it is soil-less cultivation. It can be very feasible for people to grow plants in crowded cities where there are less parks and garden areas.