Soil Fertility

Q.

What happens if the field is not ploughed before sowing seeds?

Q. The loosened soil helps in the growth of earthworms and microbes present in the soil.

1. True
2. False

Q.

Which of the following can be added to the soil to improve its fertility?

1. Manure

2. Water

3. Fertilisers

4. Common salt

Q.

Which of the following is not an advantage of preparing the soil?

1. Both A & B

2. It allows the roots to penetrate deep into the soil and breath easily.

3. The loosened soil promotes growth of earthworms and microbes.

4. It helps in soil erosion.

Q.

What is composting?

Q.

Which of the following is an essential element for plant growth?

1. Lead

2. Argon

3. Helium

4. Carbon

Q.

Which of the following are bacterial biofertilisers?

1. Rhizobium

2. Azotobacter

3. Azolla

4. Azospirillum

Q.

Which of the following organisms contribute to soil fertility?

1. Cricket

2. Butterfly

3. Earthworm

4. Flea

Q.

Which of the following organisms do not play a role in increasing soil fertility?

1. Earthworms

2. Termites

3. Caterpillars

4. Fungi

Q.

Essential elements that enhance plant growth are naturally available in soil through which of the following means?

1. By the addition of chemical fertilisers.

2. By the addition of chemical pesticides.

3. By microbial decomposition of plants/animals.

4. All of the above.

Q. Organic manure is considered better than fertilizers because ___ .

1. it decreases the water holding capacity of the soil
2. it improves the texture of the soil
3. it is less rich in plant nutrients
4. it can be prepared in the fields

Q. Which of the following factors influence plant growth?

1. Soil nutrient concentration
2. pH of the soil
3. Salinity of the soil
4. Water content

Q. Which of these given statements are true?

a) Soil productivity depends on both soil health and soil fertility.
b) Biofertilisers do not contain nutrients in them like organic manures.
c) Panchgavya is used as food for hens and fish in ponds.

1. (a), (b) and (c) are true
2. only (a) is incorrect
3. (a) and (b) are true
4. (a) and (c) are true

Q. ______ is the best tool to remove the weeds.

1. Leveller
2. Plough
3. Hoe
4. Cultivator

Q. Explain how fertilisers are different from manure.

Q.

How can you determine the pH and nutrient content of soil?

1. During soil preparation

2. By soil testing

3. By examining the soil under the microscope

4. None of the above

Q.

Which of the following is/are the reason(s) why farmers depend on chemical fertilisers/pesticides?

1. Increase in pests

2. A decline in soil fertility

3. Human health issues

4. Financial factors

Q. Find out fertilizers from the following options

1. Potash
2. Super phosphate
3. NPK
4. All the above

Q.

State any two differences between manure and fertilizers.

Q.

Which of the following is used as a biofertiliser?

1. Rhizobium

2. Salmonella

3. Clostridium

4. Lactobacillus

Q.

Which of the organisms below help to improve the soil?

1. scorpion

2. rabbits

3. earthworm

4. bee

Q. Manures help in

1. growth of helpful soil organisms.
2. increasing air gaps of soil.
3. increasing water holding capacity.
4. enriching soil with nutrients.

Q. Match the following agricultural implements with their uses.

1. Removing weeds
2. Harvesting
3. Loosening soil

Q.

Crops have to be stored properly to protect them from pests, moisture and micro-organisms.

1. True

2. False

Q.

Adding manures and fertilizers help in

1. Both a and b

2. Increasing surface area of soil

3. Increasing nutrient content of the soil

4. None of the above

Q. Which of the following statements is not true for organic manure?

1. It enhances water holding capacity of soil.
2. It has a balance of all plant nutrients.
3. It provides humus to soil.
4. It improves texture of soil

Q.

Which of the following is not a microbial fertiliser?

1. Rhizobium

2. Azotobacter

3. Azospirillum

4. Azolla

Q. Explain how fertilisers are different from manure.

Q.

Which of the following factors discourage the growth of microorganisms in the soil?

1. Proper irrigation

2. High organic content

3. Presence of chemical pesticides

4. Proper pH

Q.

Which one of the following is NOT a biofertiliser?

1. Rhizobium

2. Azotobacter

3. Mycorrhiza

4. Agrobacterium