Essential Elements for Plant Growth

Q.

The nutrients which are required by the plants in large quantities are called

___ .

Q.

There are about ____ elements that are essential for the growth of plants.

1. 10

2. 20

3. 40

4. 80

Q.

What are macronutrients? How many are there in plants?

Q.

In precision farming, which of the following parameters is/are tested before cultivation?

1. nature of soil

2. water holding capacity of soil

3. pH

4. the total available area for cultivation

Q.

Does a micronutrient affect chlorophyll synthesis?

Q. Which of the following are macronutrients?

1. Mg & Fe
2. Fe & Zn
3. Mg & Ca
4. Fe & Cu

Q.

The growth of a plant is adversely affected if an essential nutrient is present below its critical concentration.

1. essential element concentration below which plant growth is retarded.

2. essential element concentration below which plant growth becomes stunted.

Q.

Which of the following are micronutrients?

1. Ca & S

2. Mg & Mo

3. Fe & Cu

4. K & Mg

Q. is a micronutrient for plants.

1. Nitrogen
2. Phosphorus
3. Iron

Q.

The decomposition process carried out by soil microorganisms enhances the natural availability of ________ in the soil.

1. water

2. essential elements

3. small insects

4. Both A and B

Q.

pH and the concentration of nutrients in the soil can be determined by ______.

1. soil testing

2. soil tasting

3. soil mixing

4. soil contouring

Q. Which of the following non-metal is used for the manufacture of fertilizers?

1. Chlorine
2. Sulphur
3. Phosphorus
4. None of the above

Q.

Which of the following are essential macronutrients?

1. Mg & Fe

2. Fe & Zn

3. Mg & Ca

4. Fe & Cu

Q. Identify the plants and animals indigenous to Kerala.

1. 
2. Kachil
3. Njalipoovan
4. 
5. Vechoor Cow
6. 

Q. Nutrients required by plants in large amounts are called .

1. meganutrients
2. macronutrients
3. micronutrients