17 / 28 facts of the farm ? 140 animals, 20 vikingred and 120 vikingholstein ? 305 days milk yield average 12,230 kg, 4.1% fat, 3.5% protein ? ecm 13,007 kg (energy corrected milk) ? average calving interval 378 days ? 100 ha of fields ? 100 ha of forest most of the