Tag: manure

Questions Related to manure

What is manure?

evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. It is a natural material obtained by decaying plant and animal waste.

  2. It is a synthetic material prepared in laboratory.

  3. It is a semi synthetic  material.

  4. It can be both natural and synthetic.

Show answer
Correct Option: A
Explanation:

Manure is a natural material, obtained by decaying plant and animal waste, that can be applied to the soil to enhance its fertility. Manure usually consist of faeces and urine of domestic livestock, with or without accompanying litter such as straw, hay, or bedding. The most common sources of manure are cows, horses, sheep.

So, the correct answer is 'It is a natural material obtained by decaying plant and animal waste '.

The organic manure is considered better than fertilisers because

evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. It can be prepared in the factories.

  2. It is less rich in plant nutrient.

  3. It improves the texture of the soil.

  4. It decreases the water holding capacity of the soil.

Show answer
Correct Option: C
Explanation:

The organic manure contains a high amount of organic matter which increases the capability of the soil to hold the water. They are prepared by the decomposition of the organic matter by the microbes. They are highly rich in the plant nutrients. They also help to improve the quality and texture of the soil. The gaseous exchange takes place easily in this soil which allows the germination and growth of the plants properly. 

Thus, the correct answer is option C. 

The nodules present in the leguminous plants appear pink in colour due to the presence of 

evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. RBC.s

  2. leghaemoglobin

  3. nitrogenase enzyme

  4. bacterial secretion

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Correct Option: B

Which of the following statements is incorrect about leghaemoglobin?

evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. It acts as $O _2$ scavenger

  2. It imparts pink or red colour to the nodules

  3. It combines with $O _2$ and protects nitrogenase

  4. It is a Mo-Fe protein.

Show answer
Correct Option: D

Read the following statements and select the correct answer: - 


(i) Rhizobium leguminosarum is also known as Bacillus radicicola.
(ii) Nitrifying bacteria (Nitrosomonas, etc) are chemoautotrophs.
(iii) Enzyme nitrogenase fixes $N _2$ under aerobic conditions.
(iv) Leghaemoglobin creates aerobic conditions for the enzyme nitrogenase. 

evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. Statements (i), (ii) and (iii) are correct

  2. Statements (i) and (ii) are correct

  3. Statements (iii) and (iv) are correct

  4. All statements are correct

Show answer
Correct Option: B
Explanation:

Statements I and ii are correct. Rhizobium leguminosarum is also known as Bacillus radicicola. Nitrifying bacteria (Nitrosomonas, etc) are chemoautotrophs. They use inorganic energy sources. However, the enzyme nitrogenase is highly sensitive to oxygen and gets readily oxidised in it's presence and Leghaemoglobin creates anerobic conditions for the enzyme nitrogenase by scavenging the oxygen molecules.

Thus, the correct answer is 'Statements (i) and (ii) are correct.' 

_______ conditions are created by leghaemoglobin in the root nodule of a legume.

evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. Aerobic

  2. Anaerobic

  3. Acidic

  4. Alkaline

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Correct Option: B

Biofertilizers are organisms that enrich the nutrient quality of the soil. Which of the following can be used as biofertilisers ?

evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. Nitrogen fixing cyanobacteria

  2. Nitrogen fixing bacteria

  3. Mycorrhizae

  4. All of these

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Correct Option: D
Explanation:
Nitrogen fixing cyanobacteria, Nitrogen fixing bacteria and mycorrhizae all can be used as biofertilisers as they all enrich the nutrient quality of the soil.
So, the correct option is 'All of these'

If by radiation all nitrogenase enzyme is inactivated, then there will be no.

evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. fixation of nitrogen in legumes

  2. conversion of nitrate into nitrogen

  3. conversion from nitrate to nitrate in legumes

  4. conversion from ammonium to nitrate in soil

Show answer
Correct Option: A

Leghaemoglobin is produced in response to 

evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. Respiration

  2. Fatty acid oxidation

  3. Photosynthesis

  4. $N _2$ -fixation

Show answer
Correct Option: D
Explanation:
Leghaemoglobin is produced by legumes in response to the roots being colonized by nitrogen-fixing bacteria, termed rhizobia, as part of the symbiotic interaction between plant and bacterium. 
Thus, the correct answer is 'N$ _2$ - fixation.'

Match column I with column II and select the correct answer from the given codes. 

Column I    Column II
A. Azolla (i) Symbiotic $N _2$ - fixer
B. Rotenone (ii) Symbiotic association with $N _2$ - fixing cyanobacteria
C. Crotolaria juncea  (iii) Natural insecticide
D. Frankia (iv) Green manure
evs a seeds tells a farmer's story manure manures and fertilisers water absorption organ

  1. A-(ii), B-(iii), C-(iv), D-(i)

  2. A-(ii), B-(iv), C-(iii), D-(i)

  3. A-(iii), B-(i), C-(iv), D-(iii)

  4. A-(i), B-(iii), C-(iv), D-(ii)

Show answer
Correct Option: A
Explanation:
 Azolla  Symbiotic association with N2N2 - fixing cyanobacteria
 Rotenone  Natural insecticide
 Crotolaria juncea  Green manure
 Frankia Symbiotic N2N2 - fixerN2

So, the correct option is 'A-(ii), B-(iii), C-(iv), D-(i)'.