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What is the accepted standard length for a lactation record for dairy cattle?(a) 200 days(b) 305 days(c) 365 days(d) 100 daysI got this question during an online exam.Question is taken from Cattle Health in portion Cattle Health of Dairy Engineering

Answer»

Correct option is (B) 305 days

To explain: The standard period of 305 days has been chosen because this is APPROXIMATELY the normal lactation length of cows calving at intervals of 12 MONTHS. In tropical cattle, RESTRICTING the lactation records to 305 days would have less effect, as few cow’s milk for more than 305 days.



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