Tag: nutrients and nutrition

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

Hydroponics is growing plants

  1. Without soil

  2. Without organic matter

  3. In water

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

Culturing of plants in soil less medium is called hydroponics. Plants are raised in small tanks 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. There is no need of organic matter. 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 option is D.

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

Advantages of hydroponic cultures are that

  1. Plants can be grown with controlled nutrients

  2. Natural calamities such as floods and drought can be avoided

  3. Pest problems can be kept controlled

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

Hydroponics is the art of growing plants in absence of soil in a nutrient medium of defined concentration. It was initiated by Von Sachs. The technique is useful because plants can be grown in a defined medium. Pests can be avoided and plants can be protected from floods and drought etc. Also plants can be protected from various soil and water pollutants. In future, when pressure on land increases due to population growth, hydroponics will emerge as highly useful technique.

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

Hydroponics is growing plants in

  1. Water

  2. Soil culture

  3. Solution of mineral nutrients

  4. Tissue culture medium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • In 1860, Julius von Sachs, a prominent German botanist, demonstrated, for the first time, that plants could be grown to maturity in a defined nutrient solution in the complete absence of soil. This technique of growing plants in a nutrient solution is known as hydroponics.
  • Hence Hydroponics is growing plants in a solution of mineral nutrients.
  • So, the correct answer is 'Solution of mineral nutrients'.
Multiple choice botany mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements nutrients and nutrition

The disadvantage of hydroponic method is that it is

  1. Requires large quantity of water.

  2. Time consuming.

  3. Expensive.

  4. Harmful to plants.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hydroponics requires less water than irrigation on agricultural lands.

It is a quicker and a safer as well as productive method.
The disadvantage is that it is an expensive project which requires proper conditions and large investment.
So the correct answer 'Expensive'.

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

Hydroponic is a technique of growing

  1. Submerged plants

  2. Free floating aquatic plants

  3. Terrestrial plants in sand

  4. Terrestrial plants in water containing nutrients
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydroponics is a technique of growing terrestrial plants.

It uses a nutrient solution called Hoagland solution.
A growing medium is used along with a thin layer of nutrient solution.
So the correct answer is 'Terrestrial plants in water containing nutrients'.

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

Hydroponic requires

  1. 1/10 of water.

  2. 1/35 of water.

  3. 1/55 of water.

  4. 1/5 of water.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydroponics requires 10 times less water than normal agricultural plants that require proper methods of watering. A lot of water gets evaporated from the soil or seeps deep inside the layers. But in hydroponics water requirement is just 1/10 of water requirements of traditional agriculture.

So the correct answer is ' 1/10 of water'.