Question

The ideal lactation length of Jersey cow should be:

• A. 305 days
• B. 205 days
• C. 105 days
• D. 405 days

Hint:

Standard lactation length for dairy cattle = 305 days

Answer 1

The Correct Option is A

Concept:
Lactation length is the duration for which a cow produces milk after calving. It is a key parameter in dairy management and is standardized for comparison of milk yield among breeds.

Step 1: Understanding Lactation Length

• Lactation begins after calving and continues until drying off.
• It directly affects total milk production.

Step 2: Standard Lactation Period

• The standard lactation period for dairy cattle is 305 days.
• This standard is used worldwide for comparing productivity.

Step 3: Application to Jersey Cow

• Jersey is a high-yielding dairy breed.
• Its ideal lactation length aligns with the standard period.

Step 4: Eliminating other options

• 205 days → Too short
• 105 days → Extremely short
• 405 days → Too long and impractical Final Conclusion: \[ \boxed{305 \text{ days}} \]