©Tim Scrivener
More and more block calving herds are capturing the “phenomenal” fertility benefits of Irish genetics, which are proving relevant to both spring and autumn-calving systems in the UK. The economic breeding index (EBI), launched by the Irish Cattle Breeding Federation (ICBF) in 2001, rates cows on suitability for spring-calving, grass-based systems, with fertility weightings of 24% on calving interval and 11% on survival. A change of tack from the residual breeding index (RBI), the EBI strives to synchronise cow dry […]