Question

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Face-out type of arrangement in a barn saves 20% floor area as compared to face-in type.
Reason R: Manure alley can be eliminated in the face-in type of arrangement.
In light of the above statements, choose the correct answer from the options given below

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but R is NOT the correct explanation of A
• C. A is true but R is false
• D. A is false but R is true

Hint:

Remember the differences between stanchion barn arrangements:
- Face-in: Saves floor area (narrower barn), central feed alley, manure alleys on the sides.
- Face-out: Wider barn, central manure alley (easier cleaning and milking), feed alleys on the sides.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
In dairy farming, the layout of stanchion barns plays a vital role in housing management, sanitation, and labor efficiency.
The two primary configurations used for housing dairy cows in double rows are:
1. Face-in (Head-to-Head) System: Animals face each other towards a central feed passage.
2. Face-out (Tail-to-Tail) System: Animals face away from each other towards outer walls, with a central manure passage.

Step 2: Detailed Explanation:
Let us analyze both statements in detail:
- Assertion A: "Face-out type of arrangement in a barn saves 20% floor area as compared to face-in type."
This statement is incorrect.
In a face-in arrangement, the central feed passage is shared between two rows of cows, which significantly reduces the total width of the barn compared to a face-out arrangement (where separate feed passages must be maintained along both outer walls).
Because of this shared central space, the face-in system is more compact and saves about 10% to 15% of the total floor area. The face-out system does not save floor area.
- Reason R: "Manure alley can be eliminated in the face-in type of arrangement."
According to standard agricultural engineering textbooks and competitive exam answer keys, this statement is considered true.
In a face-in layout, the cows face inwards, so their tails and manure discharge are located towards the outer walls.
With proper gutters and automated mechanical scrapers installed along the outer edges, a dedicated wide central manure alley can be omitted or eliminated, utilizing that space for other operations.
Therefore, Assertion A is false, but Reason R is true.

Step 3: Final Answer:
The correct option is (D).