quality:corruption, information:classification, quality:correction
Production

The 2008 average actual production for all USA Holstein herds that were enrolled in production-testing programs and eligible for genetic evaluations was 23,022 pounds (10,443 kg) of milk, 840 pounds (380 kg) of butterfat, and 709 pounds (322 kg) of protein per year. Total lifetime productivity can be inferred from the average lifetime of US cows. This has been decreasing regularly in recent years and now stands at around 2.75 lactations, which when multiplied by average lactation yield above gives around 61,729 pounds (28,000 kg) of milk.

The current national Holstein milk production leader is Bur-Wall Buckeye Gigi EX-94 3E, which produced 74,650 pounds (33,860 kg) of milk in 365 days, completing her record in 2016.

The considerable advantage, compared to the UK, for example, can be explained by several factors: