Question

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Orientation of poultry house should be in East-West direction in tropical areas.
Reason (R): East-West orientation avoids ingress of direct sunlight inside the shed.
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:

In tropical climates: Orient poultry houses East-West to minimize direct solar heat gain.
In temperate/cold climates: Orient poultry houses North-South to maximize sunlight entry and keep the house warm.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Poultry house design and orientation are critical to regulate the microclimate inside the shed, particularly in tropical regions where heat stress is a major factor limiting poultry productivity.

Step 2: Detailed Explanation:
Let us analyze both statements and their relationship:
- Assertion (A): In tropical regions (such as India), poultry houses must be built with their long axis running from East to West.
This orientation ensures that the closed end walls face the rising and setting sun, while the long, open sides face North and South.
This is correct.
- Reason (R): An East-West orientation prevents direct sunlight (and solar radiation) from entering the shed through the open sides during the morning and afternoon.
This minimizes radiant heat load inside the house, helping keep the birds cooler and reducing the risk of mortality from heat stroke.
If the house were oriented North-South, direct sunlight would sweep through the entire length of the shed, causing severe heat stress.
Therefore, Reason (R) is correct, and it serves as the correct physical explanation for the housing orientation recommended in Assertion (A).

Step 3: Final Answer:
Both (A) and (R) are true and (R) is the correct explanation of (A).