Question

The role of individual mineral elements in the plant body has been determined by growing plants with their roots immersed in nutrient solution without soil. This technique is called as
A) Hydroponics
B) Photolysis
C) Bulk method
D) Bagging
E)Hypostatic

Answer 1

Hint:Photolysis may be defined as decomposition of molecules due to the action of light.Bagging is the technique of covering the stigma with bags to prevent its contamination with undesired pollens and to ensure its pollination with desired parents.
Bulk method which is also known as Mass and the population method is the strategy of crop improvement. This method was developed by Nilson.

Complete answer:
Hydroponics is a method of growing plants with the help of mineral solution in water, without the use of soil. It is a subset of soilless culture. There are some plants that don’t grow in a particular climate but are possible to grow in a controlled environment system called Hydroponics.
Nutrients used in the hydroponic system: They can be from different sources like chemical fertilizers, duck manure, artificial nutrient solutions and fish excrement.
Advantage of hydroponic technique: Decrease water requirement, no soil requirement, better use of space, better growth, saves time and labor, less requirement of insecticide.
Challenges:-Requires time, expenses initially, diseases may spread quickly.
Plants grown using this technique are tomatoes, strawberries, marijuana, peppers, and cucumbers.

So, the correct answer is Hydroponics.

Note:An aquaponic system also contains soil free plant beds which are suspended over the body of water containing nutrients required specifically for plant growth. There are six types of hydroponic system water culture, Ebb and Flow, Drip, Nutrient Film Technique and Aeroponic.