Tag: role of organic manures in soil management

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Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Animal manure can be contaminated due to

  1. Paper

  2. Wool

  3. Stones

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Animal manure is organic matter, which is used as a fertilizer in agriculture. The manure gets contaminated only when micro-organisms attack. Animal manure can improve the soil aggregation so that the soil becomes more fertile. Horse manure is mostly used in agriculture apart from the horse manure cattle manures like cow dung, sheep manure.

So, the correct option is ' None of the above'.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

.......... manure should not be applied to edible crops which are to be harvested soon.

  1. Stored

  2. Old

  3. Fresh

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Manure is an organic substance produced by the decomposition of plant and animal wastes in the presence of microorganisms and used as fertilizers. Fresh manure has microbes in it, that may be dangerous. It should not be applied to edible crops that will soon be harvested. Instead of fresh manure aged or old manure should be applied to the edible crops.

Therefore, the correct answer is option C.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Compost is___________

  1. Decomposed remnants of organic material

  2. Decomposed remnants of inorganic material

  3. Fresh remnants of organic material

  4. Fresh remnants of inorganic material
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Compost is a nutrient-rich organic substance produced by the decomposition of remnants wastes like dung or bedding. It is used in gardens, agriculture as a fertilizer.

Therefore, the correct answer is option A.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

_____________ is mainly used to ensure good vegetative growth (leaves, branches, and flowers), giving rise to healthy plants.

  1. Manure

  2. Insecticide

  3. Pesticide

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Manure is used as an organic fertiliser for the better growth of plants. Manure supply nutrients required for the plant growth. It also, improve the fertility of the soil. Horse manure is mainly used as fertilisers in many agricultural fields.

So, the correct option is 'Manure'.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

.......... is a most important fertilizer.

  1. Carbon

  2. Phosphorous

  3. Nitrogen

  4. Oxygen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Nitrogen is considered to be the most important fertilizer, and plants absorb more nitrogen than any other element. Nitrogen is essential in making sure plants are healthy as they develop and nutritious to eat after they are harvested. That is because nitrogen is essential in the formation of protein, and protein makes up much of the tissues of most living things. 
Therefore, the correct answer is option C.
Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

The increased use of nitrogen fertilizers results in .......... in the atmosphere.

  1. Greenhouse effect

  2. Global warming

  3. Ozone depletion

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • The increased use of nitrogen fertilizer, adds to the already existing amount of reactive nitrogen in the atmosphere, in the form of nitrous oxide (N2O) through the nitrogen cycle. 
  • It is the third most important greenhouse gas following carbon dioxide and methane. Greenhouses gases, including nitrous oxide, causes global warming by absorbing the solar energy in the atmosphere and global warming leads to the stratospheric ozone depletion. 

Therefore, the correct answer is option D.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Which of the following descriptions is true for describing a fertiliser?

  1. Used in large quantity

  2. Organic in nature

  3. Does not cause pollution

  4. Produced in factories
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fertilizer is a natural or an artificial material that is used in agriculture to grow the crops. Fertilizers are mixed with soils for the better growing of crops and to supply minerals and nutrients to plants. Fertilisers may be organic and inorganic. Fertilisers are mainly made up of horse manure and cow dung.

So, the correct option is 'Produced in industries'.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

.......... contains large quantities of organic matter and also supplies small quantities of nutrients to the soil.

  1. Manure

  2. Water

  3. Seeds

  4. Roots
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Manure is an organic substance produced by the decomposition of plant and animal wastes in the presence of microorganism and used as fertilizers because it contains nutrients such as nitrogen, that are trapped by bacteria in the soil. Manure contains large quantities of organic matter and also supplies small quantities of nutrients to the soil.


Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Fertilizer are used for _______

  1. Ensure good vegetative growth (leaves, branches and flowers),

  2. Giving rise to healthy plants

  3. All of the above

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fertilizers provide essential nutrients like nitrogen, phosphorus, and potassium, which are necessary for overall plant health, vegetative growth, and reproductive development.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Fertilizers gets washed away due to 

  1. Excessive irrigation

  2. Not fully absorbed by the plants

  3. Above A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fertilisers, chemically synthesized substances which are rich in plant nutrients such as NPK. They are artificially made but have a rapid response. Fertilizers are any solid, liquid or gaseous substances that are applied to the soil, directly on the plant (foliage) or added to aqueous solutions (as in fertigation) to maintain soil fertility, improve crop development, yield and/or crop quality. Sometimes fertilizers get washed away due to excessive irrigation and are not fully absorbed by the plants. Overuse of fertilisers can cause negative effects like loose soil fertility, bioaccumulation etc.

Thus, the correct answer is option C.