Question

Assertion: Farmyard manure is the most commonly used organic manure in India.

Reason: Manure forms colloidal particles and soil crumbs.

Read the assertion and reason statements carefully and answer the question on the basis of the following options.

• A. The assertion is true and the reason is also true; Reason is a correct explanation for Assertion.
• B. The assertion is true and the reason is also true; Reason is NOT a correct explanation for Assertion.
• C. The assertion is true but the reason is false.
• D. The assertion is false but the reason is true.

Answer 1

The correct option is A

The assertion is true and the reason is also true; Reason is a correct explanation for Assertion.

The correct option is A.

Assertion statement:

1. The decomposing mixture of excrement and urine of farm animals, as well as litter and leftover material from roughages present in fodder given to cattle, is referred to as farmyard manure.
2. Farmyard manure (FYM) is the most commonly used organic manure in India.
3. Other commonly used manures are compost and green manure.

So, the assertion is correct.

Reason statement:

1. Sand and silt particles are held together in crumbs by clay and organic substances.
2. When lime or humus is introduced to clay soil, the clay particles cluster around them.
3. Soil crumbs are formed when they clump together.
4. As manures are rich in organic matter, they help in forming colloidal particles and soil crumbs.

So, the reason stated is also correct and a correct explanation of the assertion.

Final Answer: (A) The assertion is true, and the reason is also true; Reason is a correct explanation for Assertion.