... et al.: Reproductive Performance, Udder Health, and Antibiotic Resistance in Mastitis Bacteria isolated from Norwegian Red cows in Conventional and Organic Farming Acta Veterinaria Scandinavica ... energy intake and increased winter breeding in the organic cows In a Swedish study, the calving interval and the intervals from calving to first and last AI, were shorter for organic cows compared ... the interactions terms; management system by parity, parity by season, management system by season, barn type by season, barn type by management system, barn type by parity Herd was included in...