Questions and Answers about Biofertilizers

fertilizer exam questions

MCQ on Biofertilizers:

Ques. Which one is a biofertilizer?
(a) VAM
(b) Sporeine
(c) Devine
(d) Agent Orange

Ans. (a)

Ques. Which is correct?
(a) Legumes fix nitrogen through bacteria in their leaves
(b) Legumes fix nitrogen independent of bacteria
(c) Legumes do not fix nitrogen
(d) Legumes fix nitrogen through bacteria in their roots

Ans. (d)

Ques. What is required for nitrogen fixation by Rhizobium?
(a) Potassium
(b) Phosphorus
(c) Nitrate
(d) Sodium

Ans. (b)

Ques. If wheat field is inoculated with Rhizobium
(a) Soil will become nitrogen rich
(b) Soil will be depleted of nitrogen
(c) Soil will become rich in calcium
(d) No effect on soil nitrogen

Ans. (d)

Related: questions with answers in Satellite Communication

Ques. Green manuring enhances crop yield by
(a) 15 –25%
(b) 5 –10%
(c) 30 –50%
(d) 60 –70%

Ans. (c)

Ques. Which element plays an important role in nitrogen fixation?
(a) Mn
(b) Mo
(c) Zn
(d) Cu

Ans. (b)

Ques. The biofertilizer present in the roots of legumes is
(a) Anabaena
(b) Rhizobium
(c) Azospirillum
(d) All of these

Ans. (b)

Ques. Aquatic fern which is an excellent biofertilizer
(a) Salvinia
(b) Marsilea
(c) Pteridium
(d) Azolla

Ans. (d)

Related: Questions and answers about Human Rights

Ques. Crop rotation is carried out for
(a) Increasing acidity of soil
(b) Decreasing fertility of soil
(c) Increasing fertility of soil
(d) All these

Ans. (c)

Ques. Rhizosphere is the region where
(a) Rhizobium forms root nodule
(b) Bacterial and root nearly make contact
(c) Algae and root make contact
(d) Soil and root make contact

Ans. (d)

Ques. Composited manure is formed from
(a) Farmyard manure and green manure
(b) Organic wastes from which biogas has been extracted
(c) Rotted vegetable and animal refuse
(d) Farm refuse and household refuse

Ans. (c)

Ques. Which disease is caused in children due to excessive use of nitrate fertilizers?
(a) Septicemia
(b) Jaundice
(c) Methaemoglobinaemia
(d) Mumps

Ans. (c)

Related: different branches of Biology

Ques. A green manure is
(a) Rice
(b) Sorghum
(c) Maize
(d) Sesbania

Ans. (d)

Ques. Which micro-organism is most commonly used as Bio-fertilizer of pulse legumes, oil legumes and fodder legumes ?
(a) Rhizobium
(b) Azolla
(c) Blue-green algae
(d) Azospirillum

Ans. (a)

Ques. Biofertilizers
(a) Kill pests
(b) Prevent pest growth
(c) Retain soil fertility
(d) All these

Ans. (c)

Ques. Which of the following is NOT a fertilizer product?
(a) Urea
(b) Murate of Potash
(c) Di Amonium Phosphate
(d) All are fertilizers

Ans. (d)

Ques. Green manure plants belong to
(a) Compositae
(b) Solanaceae
(c) Poaceae
(d) Leguminosae

Ans. (d)

Related: Immunity mcqs with answers

Ques. Biofertilizers include
(a) Nitrogen fixing bacteria
(b) Nitrogen fixing cyanobacteria
(c) Both bacteria and cyanobacteria
(d) Bacteria, cyanobactria and mycorrhizal fungi

Ans. (d)

Ques. Cow dung is appropriately used as
(a) Manure
(b) Fuel
(c) Medicine
(d) Building material

Ans. (a)

Ques. Most famous nitrogen fixing bacterium/biofertilizer is
(a) Nitrobacter
(b) Nitrococcus
(c) Rhizobium
(d) Nitrosomonas

Ans. (c)

Ques. Some blue green algae can be used as biofertilizer as they are
(a) Photosynthetic
(b) Surrounded by mucilage
(c) Growing every where
(d) Capable of fixing nitrogen

Ans. (d)

Ques. Organic forming does not include
(a) Green manures
(b) Chemical fertilizer
(c) Crop rotation
(d) Compost and farmyard manures

Ans. (b)

About the author

Richa Bhardwaj

B. Tech from NIT Kurushetra, Richa has keen interest in Science and loves to teach students about it through lectures and assignments. She always try to use simple language and sentences while writing to make sure learner understands everything properly.

Leave a Comment