Tag: manures and fertilisers

Questions Related to manures and fertilisers

The first effect of adding fertiliser to a pond would most likely be to________

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

  1. Decrease the amount of phytoplankton

  2. Kill most bacteria

  3. Lower the compensation point

  4. Increase the amount of phytoplankton

Show answer
Correct Option: D
Explanation:

  • The fertilizers are the rich source of nitrogen and phosphorous used for the growth of plants.
  •  When the fertilizers are introduced in the pond, these nutrients increase the fertility of the pond. 
  • The phytoplanktons are the autotrophic organisms in the aquatic environment that utilize these nutrients and increase in the number. 
Thus, the correct answer is option D. 

Apart from soil fertility, manure also enhances .......... of the soil. 

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

  1. Decomposition of microorganisms

  2. Roots holding capacity

  3. Soil binding capacity

  4. Water holding capacity

Show answer
Correct Option: D
Explanation:
  • Manure is an organic substance produced by the decomposition of plant and animal wastes in the presence of microorganisms and used as fertilizers. It enhances the water holding capacity of the soil. 
  • It also makes the soil porous which makes the exchange of gases easy.

Therefore, the correct answer is option D.

Rhizobium fixes atmospheric _____________

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

  1. Oxygen

  2. Carbon

  3. Nitrogen

  4. All of the above

Show answer
Correct Option: C
Explanation:

  • Rhizobium is the symbiotic soil bacteria that fix nitrogen in leguminous plants. They form a symbiotic relationship with legume and resides in the root nodules of legumes. 
  • They cannot independently fix nitrogen. 

Therefore, the correct answer is option C.

.......... increases crop productivity only to some extent.

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

  1. Fertilizer

  2. Manure

  3. Water

  4. None of these

Show answer
Correct Option: B

Which of the following is a synthetic substance?

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

  1. Manure

  2. Nutrients

  3. Minerals

  4. Fertilizers

Show answer
Correct Option: D
Explanation:
  • Fertilizers, chemically synthesized substances that are rich in plant nutrients such as NPK. 
  • They are artificially made but have a rapid response. The overuse of fertilizers can cause negative effects like loose soil fertility.

Name the macronutrients provided by fertilizers.

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

  1. Nitrogen

  2. Phosphorous

  3. Potassium

  4. All of the above

Show answer
Correct Option: D
Explanation:

  • Fertilizers, the chemically synthesized substances which are very rich in the plant nutrients like nitrogen, phosphorous and potassium.
  • Nitrogen (N) required for the leaf growth 
  • Phosphorus (P) required for the development of roots, flowers, seeds, and fruit 
  • Potassium (K) required for strong stem growth, movement of water in plants, promotion of flowering and fruiting. 

Therefore, the correct answer is option D.

Animal manure can be contaminated due to

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

  1. Paper

  2. Wool

  3. Stones

  4. None of the above

Show answer
Correct Option: D
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'.

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

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

  1. Stored

  2. Old

  3. Fresh

  4. All of the above

Show answer
Correct Option: C
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.

Compost is___________

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

  1. Decomposed remnants of organic material

  2. Decomposed remnants of inorganic material

  3. Fresh remnants of organic material

  4. Fresh remnants of inorganic material

Show answer
Correct Option: A
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.

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

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

  1. Manure 

  2. Insecticide

  3. Pesticide

  4. None of the above

Show answer
Correct Option: A
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'.