SSC sample papers

Questions and Answers about Biofertilizers

fertilizer exam questions

Fertilizer Exam Questions:

MCQ on Biofertilizers

Question 1
Aquatic fern which is an excellent biofertilizer
A
Azolla
B
Marsilea
C
Salvinia
D
Pteridium
Question 2
Which element plays an important role in nitrogen fixation?
A
Zn
B
Mo
C
Cu
D
Mn
Question 3
A green manure is

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A
Maize
B
Sesbania
C
Rice
D
Sorghum
Question 4
What is required for nitrogen fixation by Rhizobium?
A
Sodium
B
Nitrate
C
Potassium
D
Phosphorus
Question 5
If wheat field is inoculated with Rhizobium
A
Soil will be depleted of nitrogen
B
Soil will become nitrogen rich
C
No effect on soil nitrogen
D
Soil will become rich in calcium
Question 6
Some blue green algae can be used as biofertilizer as they are
A
Photosynthetic
B
Capable of fixing nitrogen
C
Growing every where
D
Surrounded by mucilage
Question 7
Green manuring enhances crop yield by
A
60 –70%
B
30 –50%
C
15 –25%
D
5 –10%
Question 8
Cow dung is appropriately used as
A
Medicine
B
Building material
C
Fuel
D
Manure
Question 9
Biofertilizers
A
Prevent pest growth
B
Retain soil fertility
C
All these
D
Kill pests
Question 10
Rhizosphere is the region where
A
Bacterial and root nearly make contact
B
Rhizobium forms root nodules
C
Soil and root make contact
D
Algae and root make contact
Question 11
Which is correct?
A
Legumes do not fix nitrogen
B
Legumes fix nitrogen through bacteria in their roots
C
Legumes fix nitrogen through bacteria in their leaves
D
Legumes fix nitrogen independent of bacteria
Question 12
Green manure plants belong to
A
Solanaceae
B
Compositae
C
Leguminosae
D
Poaceae
Question 13
Crop rotation is carried out for

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A
Increasing acidity of soil
B
Decreasing fertility of soil
C
All these
D
Increasing fertility of soil
Question 14
The biofertilizer present in the roots of legumes is
A
All of these
B
Anabaena
C
Rhizobium
D
Azospirillum
Question 15
Biofertilizers include

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A
Bacteria, cyanobactria and mycorrhizal fungi
B
Nitrogen fixing bacteria
C
Nitrogen fixing cyanobacteria
D
Both bacteria and cyanobacteria
Question 16
Which one is a biofertilizer

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A
VAM
B
Agent Orange
C
Sporeine
D
Devine
Question 17
Organic forming does not include
A
Crop rotation
B
Green manures
C
Compost and farmyard manures
D
Chemical fertilizer
Question 18
Which disease is caused in children due to excessive use of nitrate fertilizers
A
Methaemoglobinaemia
B
Mumps
C
Jaundice
D
Septicemia
Question 19
Most famous nitrogen fixing bacterium/biofertilizer is
A
Nitrococcus
B
Nitrobacter
C
Rhizobium
D
Nitrosomonas
Question 20
Composited manure is formed from
A
Farmyard manure and green manure
B
Rotted vegetable and animal refuse
C
Organic wastes from which biogas has been extracted
D
Farm refuse and household refuse
There are 20 questions to complete.

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Vishal Arora

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