Tag: hydroponics

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Questions Related to hydroponics

Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

Hydroponics is the

  1. Growing of aquatic plants.

  2. Growing of floating aquatic plants.

  3. Growing of plants in sand.

  4. Growing of plants in nutrient balanced aqueous medium.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydroponics was pioneered by Julius Von Sach. It is a technique of growing plants in aqueous solution of nutrients. It can be used to find out the essential nutrients for plants. This technique is also called soilless cultivation.

Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

First experiments in hydroponics were performed by.

  1. Sachs

  2. Knop

  3. Hoagland

  4. Hill
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydroponics is the science of growing plants in a medium other than soil, using mixtures of the essential plant nutrient elements dissolved in water.
The first experiments was performed by Sachs in the year 1860. Later, Knop from 1861-5 performed experiments related to hydroponics. Both of them made synthetic solutions of essential plant nutrients in water. Included in these solutions were salts such as, potassium phosphate, calcium sulphate etc. giving the necessary elements N, P, S, Ca, Mg P and Fe. Mn were also included. 
Thus, the correct answer is option (A). 

Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

In plants, minerals

  1. Help establish gradients across membranes

  2. Influence water movement into cells

  3. Maintain cell shape and growth

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Minerals are very important for plants because:

1. They help in maintaining gradients across membrane's like potassium, Sodium, etc.
2. They influence water movement into the cell. For example Opening of stomata is caused by movement of water into guard cells due to influx of potassium.
3. Cell shape and growth is maintained. Example Calcium, etc
So the correct answer is 'All of the above'.

Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

What is the key principle of the EBB and flow system in hydroponics?

  1. It floods and drains periodically

  2. It makes a tide flowing over the roots

  3. It sprays a mist of nutrients on the roots

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ebb and Flow, or Flood and Drain is a system involves the periodic flooding and draining of the nutrient solutions. Basically, there are two phases of its operation. The Flood is when the water and nutrients flow the growing areas, flowing over the plants' roots. The drain is when the water drains back to the reservoir. These two actions take turn continuously, and hence their name.

So, the correct option is ‘it floods and drains periodically’.

Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

Hydroponics is growing of plants 

  1. Without soil.

  2. Without organic matter.

  3. In water.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydroponics is part of hydroculture and within this, the plant is growing in a soilless medium or in an aquatic-based environment, it uses only the mineral nutrient solution to feed the plants.

So, the correct answer is option D.

Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

Scientist credited with development of formula for balanced solution of mineral elements is?

  1. Knop

  2. Went

  3. Hill

  4. Emerson
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Knop was a scientist who is credited with the development of the formula for the balanced solution of mineral elements. He along with Sach discovered the macronutrient and conclude that Iron is essential in plants.
so the correct answer is 'Knop'.
Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

Hydroponic is a subset of what type of culture?

  1. Hydroculture

  2. Solid medium culture

  3. Xeroculture

  4. Tissue culture
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydroponics is a sub set of hydroculture. In this method plants are grown without soil by using nutrient solutions.

Tissue culture is the method of growing plants from cells or tissues, derived from an organism, in an artificial medium.
Solid medium culture involves the growth of plants or microbes on a solid support which contains the nutrients such as agar gel, etc.
So the correct answer is 'Hydroculture'.

Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

Gravel method of hydroponics is called as

  1. Solid medium culture

  2. Hydroculture

  3. Nutriculture

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solid medium culture is where plants or micro organisms are grown on a solid support like agar gel, etc.

Hydroculture involves the growth of plants in a nutrient solution with some solid support such as gravel or clay.
So the correct answer is 'Hydroculture'.

Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

Produce from the hydroponic method have

  1. Short shelf life.

  2. Long shelf life.

  3. No shelf life.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The produce from hydroponics has longer shelf life as they are nutritionally superior to the normal plants. They are given nutrition directly into the solution and they hence direct all their energy into their growth and development instead of trying to find nutrients.

So the correct answer is 'Long shelf life'.

Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

Culturing of plants in water$/$ soil-less medium is

  1. Hydroponics

  2. Sand culture

  3. Aeroponics

  4. Soil-less culture
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Culturing of plants in soil less medium is called hydroponics. Plants are raised in small tanks. They are filled with a solution containing appropriate quantities of all mineral elements. The solution is changed from time to time. It has a mechanism for aeration and circulation. Iron is added as Fe-EDTA otherwise it gets precipitated. EDTA is a chelating agent which keeps the metal ion in the soluble state. Hydroponics is useful in areas having thin, infertile and dry soils. Through this technique out of season fruits and vegetables can also be grown.

Thus, the correct answer is option A.