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A field trial testing four different concentrate escalation strategies postpartum, 0.3kg/d, 0.5kg/d, 0.7kg/d, and 1.0kg/d (concentrate amounts measured as fresh weight) was conducted in 25 Norwegian dairy herds, including 811 lactations, in the period from 1st September 2008 until 1st September 2009. Inclusion criteria were: herd size above 30 dairy cows, daily milk yield recording, unchanged production...