Tag: manure

Questions Related to manure

The cells of the roots contain cell sap at a .................. concentration than that of surrounding soil water.

biology absorption by roots - the processes involved manure manures and fertilisers water absorption organ

  1. Higher

  2. Lower

  3. Equal

  4. All of the following

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Correct Option: A
Explanation:

The cells of the roots contain cell sap (solution) at a higher concentration than that of surrounding soil water. As a result, the water is absorbed by the root hairs. This is because the water always travels from a region of high water potential to the region of lower water potential. Here, the soil possesses a higher water potential as compared to the root hair.

Mineral absorption occurs.

biology absorption by roots - the processes involved manure manures and fertilisers water absorption organ

  1. If soil solution is hypotonic

  2. If soil solution is hypertonic

  3. Independent of water potential

  4. Independent of water absorption

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Correct Option: D

Rupture and fractionation of water column present in tracheary elements does not occur during ascent of sap due to

biology absorption by roots - the processes involved manure manures and fertilisers water absorption organ

  1. Transpiration pull

  2. Weak gravitational pull

  3. Cohesion and adhesion

  4. Lignified thick walls

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Correct Option: C
Explanation:

Transpiratioal or gravitational pull exert strain so they are factors that can cause rupture of the column. 

Lignified walls are only present for structural support.
Cohesion ( attraction of water molecules towards each other) and adhesion (attraction of water molecules and the walls of the tube ) is the reason why  the column doesn't break as these attractive forces overcome the strain developed by Transpiration pull. 
So the correct answer is 'Cohesion and adhesion'.

In root hair, water enters due to.

biology absorption by roots - the processes involved manure manures and fertilisers water absorption organ

  1. Diffusion

  2. WP

  3. T.P.

  4. O.P.

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Correct Option: A

If a cell A with OP $10$ bars and TP $4$ bars is connected to cells B, A and D having OP and TP respectively $4$ and $4$, $10$ and $5$ and $7$ and $3$ bars, the flow of water will be.

biology absorption by roots - the processes involved manure manures and fertilisers water absorption organ

  1. C to A, B and D

  2. B to A, C and D

  3. D to A, B and C

  4. A to B, C and D

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Correct Option: A

Which of the following elements are most readily mobilised?

biology absorption by roots - the processes involved manure manures and fertilisers water absorption organ

  1. Phosphorus, sulphur, nitrogen and potassium

  2. Calcium, sulphur, nitrogen and phosphorus

  3. Phosphorus, sulphur, nitrogen and calcium

  4. Potassium, sulphur, nitrogen and calcium

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Correct Option: A
Explanation:

Phosphorus, sulphur, nitrogen and potassium most readily mobilise while calcium is structural component which is not remobilised.

.......... 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

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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

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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.

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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.