Modern dairy production in Iran looking for new scopes of increasing milk production, decreasing culling rate, improving fertility and other dairy indices. A growing pattern of milk production in Iranian dairy industries is obvious through past three years as most industrial dairy farms got the average production of more than 31 liters/cow/day and higher that is the case in other countries as well. Milk yields per cow in United States increased annually as reported by the USDA National Agricultural Statistics Service. Average production per cow in the United States reported in 1975 was 5180 kg as compared to 7105 kg in 1988.

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