Question 401
Manures are advisable to be used in agricultural fields than fertilizers because
(a) Manures are bio-degradable
(b) Manures do not cause strong chemical reactions
(c) Manures make the soil porous
(d) Manures are required in large quantities
- AOption (a)
A and B
- BOption (b)
A, B and C
- COption (c)
B and C
- DOption (d)
C and D
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Correct answer
A, B and C
Why this answer is correct
The correct answer is A, B, and C.
Key Points
- Manures are bio-degradable and do not cause any harm to the environment.
- Manures are slow-release fertilizers and provide nutrients to the soil over a longer period of time.
- Manures improve the soil texture and structure by making it porous, which helps in better water retention and aeration.
- Manures also increase soil organic matter, which improves soil fertility and reduces soil erosion.
Additional Information
- Option A: Manures are bio-degradable and do not cause any harm to the environment.
- This is a correct statement.
- Option B: Manures do not cause strong chemical reactions.
- This statement is incorrect as manures can cause chemical reactions in the soil, but these reactions are usually not as strong as those caused by fertilizers.
- Option C: Manures make the soil porous.
- This is a correct statement.
- Option D: Manures are required in large quantities.
- This statement is incorrect as the quantity of manure required depends on the crop type, soil type, and nutrient requirement.
- However, it is true that manures are usually applied in larger quantities than fertilizers.