Tag: role of organic manures in soil management

Questions Related to role of organic manures in soil management

.......... plants are responsible for fixing of nitrogen.

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

  1. Root

  2. Legume

  3. Tomato

  4. Algae

Show answer
Correct Option: B
Explanation:
  • In leguminous plants, the nitrogen-fixing bacteria live symbiotically in root nodules. Within these nodules, nitrogen fixation is done by them, and the $NH _3$ produced is absorbed by the plant. 

Manure helps in

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

  1. Enriching soil with nutrients

  2. Organic matter

  3. Increasing soil fertility

  4. All of the above

Show answer
Correct Option: D
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 is trapped by bacteria in the soil. Manure helps in enriching the soil with nutrients and organic matter and increasing soil fertility.

Thus, the correct answer is option D.

Choose the correct options from the following.
Advantage of fertilizers is/are

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

  1. They are nutrient specific and required in small amounts.

  2. They are water soluble and absorbed by the plant easily.

  3. They are easy to store and transport.

  4. All of the above.

Show answer
Correct Option: D
Explanation:

Fertilizers are chemically synthesized substances which are rich in plant nutrients such as NPK. They have a rapid response on application. Overuse of fertilizers can cause negative effects like decreased soil fertility, bioaccumulation etc.Although, it is very advantageous as they are nutrient specific and are required in small amounts, they are water soluble and absorbed by the plant easily and are easy to store and transport.

Thus, the correct answer is option D.

Choose the correct options from the following that describe the disadvantage of using manure

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

  1. They have less amount of nutrients as compared to fertilizers.

  2. Manures are bulky and can't be easily stored or transported.

  3. Both A and B

  4. None 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 microorganism and used as fertilizers. Disadvantages of a manure are that they have less amount of nutrients as compared to fertilizers, manures are bulky and not easy to store and transport.

Thus, the correct answer is option C.

Fertilizers contain a much higher amount of ___________ in comparison to what they use.

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

  1. Nutrients

  2. Micro-organisms

  3. Earthworms

  4. All of the above

Show answer
Correct Option: A
Explanation:

Fertilizers, chemically synthesized substances which are rich in plant nutrients such as NPK. These artificially used substances are used in very small amount but have a rapid response. But, overuse of fertilizers can cause negative effects such as decreased soil fertility. 

Thus, the correct answer is option A.

Fertilizers supply

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

  1. Nitrogen

  2. Phosphorus

  3. Potassium

  4. All of the above

Show answer
Correct Option: D
Explanation:

Fertilisers, chemically synthesized substances which are rich in plant nutrients such as NPK. Fertilizers supply nitrogen, phosphorus and potassium. They are artificially made but have a rapid response. Overuse of fertilisers can cause negative effects like loose soil fertility. 

Choose the correct options from the following.
Advantage of manure

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

  1. It is cheap.

  2. It reduces soil erosion.

  3. It increases soil fertility, water holding capacity and aeration.

  4. All of the above.

Show answer
Correct Option: D
Explanation:

Manure is an organic substance produced by the decomposition of plant and animal wastes in the presence of microorganism and used as fertilizers. Advantages of manure are that it is cheap, it reduce soil erosion, it increases soil fertility, water holding capacity and aeration.

Thus, the correct answer is option D.

Nowadays, organic farming and organic products are very popular. Which of the following is the reason for people to prefer this kind of products?

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

  1. Organic foods may have higher nutritional value than conventional food

  2. Consuming organic food may also reduce exposure to artificial chemicals

  3. It reduces air pollution

  4. All the above

Show answer
Correct Option: D
Explanation:
Cultivation of crops by using bio-fertilizers is called Organic farming and the products obtained from organic farming are called Organic products.
Organic foods have gained popularity because people have become aware of their benefits. They contain no chemical pesticides and fertilizers and are grown naturally with manure or compost and only natural pesticides and insecticides are used. Organic products may have more nutrition values, reduce environmental pollution.
So the correct option is ' All the above ' .

Which of the following conditions will give the most benefits? Why?

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

  1. Farmers use high-quality seeds, do not adopt irrigation or use fertilizers.

  2. Farmers use ordinary seeds, adopt irrigation and use fertilizer.

  3. Farmers use quality seeds, adopt irrigation, use fertilizer and use crop protection measures.

  4. None of these

Show answer
Correct Option: C
Explanation:

For more production of crops and to get more benefits from that farmer should use best quality seeds, proper irrigation, use of fertilizer for better supplement of food and best crop protection. These conditions helps in large crop production at the same time. 

Which compositing can pay its own cost by selling manure produced?

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

  1. Pulverization

  2. Pyrolysis

  3. Manual Compositing

  4. Sea Disposal

Show answer
Correct Option: C