Hydroponics

Q.

What are the modern farming methods? Explain their drawbacks?

Q. The amount of BaSo4 formed upon mixing 100ml of 20.8% Bacl2 solution with 50ml of 9.8% H2So4 solution will be

Q. Identify the correct statements:
i. Technique of growing plants in nutrient solution is called hydroponics.
ii. Hydroponics is a soil-free method of growing plants.
iii. Nutrient medium need not be aerated for optimal plant growth.

1. Only i is correct
2. Only iii is correct
3. Only ii & iii are correct
4. Only i & ii are correct

Q.

Why is purification of water and nutrient salts so important in studies involving mineral nutrition using hydroponics?

Q. The technique of growing plants as shown in the image became possible due to the efforts of

1. Krebs
2. Julius Von Sachs
3. Priestley
4. Van Niel

Q. Select an incorrect statement regarding hydroponics

1. Soil borne diseases can be prevented
2. Uniform growth and high yield
3. Water and fertilisers can be reused
4. Less expensive than conventional agriculture

Q.

What are the components of hydroponics?

Q.

What is the difference between the solution culture technique and the hydroponics??

Q. Identify the incorrect statement regarding hydroponics.

1. Convenient to add or remove an element in varied concentrations.
2. Roots of plants are immersed in nutrient solution.
3. Nutrient solution is made by dissolving mineral salts in distilled water.
4. Suitable to plants which can utilize dissolved oxygen only.

Q. Hydroponics helps in identifying

1. Elements essential to plant body
2. Elements found in soil
3. Elements found in plant body
4. Elements absorbed by plant body

Q.

Which of the following organisms have the greatest problem with photorespiration?

1. heterotrophs

2. C3 plants

3. CAM plants

4. C4 plants

Q.

Why cant all plants be grown in hydroponics?

Q. Hydroponics is a technique of

1. Growing plants in water
2. Conservation of water
3. Treatment with water and soil
4. Growing plants without soil

Q.

Give an example of an inorganic compound that can absorb moisture from the air.

Q. Plant ash indicates

1. Mineral salts absorbed by plants
2. Presence of minerals & organic matter
3. Only organic matter
4. Silica absorbed by the plants

Q.

Can blueberries be grown hydroponically?

Q. Why purified water and mineral nutrient salts in soil free defined mineral solution is required ?

Q. Why is the purification of water and nutrient salts so important in studies involving mineral nutrition using hydroponics?

Q. Name the scientist who introduced hydroponics.

Q. Technique of growing plants without soil in nutrient solution is called

1. Hydroponics
2. Parthenogenesis
3. Aquaculture
4. Tissue culture

Q.

Hydroponics is a technique of:

1. Cultivation of plants in water

2. Cultivation of plants in absence of soil

3. Cultivation of plants in a defined nutrient solution in complete absence of soil

4. Cultivation of plants with less soil and more water

Q. Which of the following is used in hydroponics?

1. Sand peat
2. Crushed quartz
3. Both A and B
4. Gravels

Q. First experiments in hydroponics were performed by.

1. Sachs
2. Knop
3. Hoagland
4. Hill

Q. Select an incorrect statement regarding hydroponics

1. Soil borne diseases can be prevented
2. Uniform growth and high yield
3. Water and fertilisers can be reused
4. Less expensive than conventional agriculture

Q.

Why is purification of water and nutrient salts so important in studies involving mineral nutrition using hydroponics?

Q. Name a chelate. Why is iron added in hydroponics along with chelating agent ?

Q. What is hydroponic culture? How is it useful in mineral nutrition studies?

Q.

Nutrient management to plants comes under crop protection management.

Q. Hydroponic technique gives a detailed study of subterranean nutrition required by plants.

1. False
2. True

Q. Hydroponics is a technique in which plants are grown in a ?

1. Water saturated sand
2. Balanced nutrient solution
3. Purified distilled water
4. Green house