Dataset on productive functional traits at first lactation and productive longevity from a herd of 185 Montbéliarde and Holstein cows managed on a low-input mountain-area grassland farm

Thedatasetavailableherecomesfrom anexperimentaldairy cattle farm located in amountainregion in CentralFrance, wherethe feeding systemsaremostlypasturegrazingcombined witha period of indoor overwintering during the colder months.Thedatasetcomprisesindividual productive andfunctional traits covering over36differentvariablesin 185 primiparousMontbéliardeand Holsteincows, followed bydataonproductivelongevity andreason for culling.The datawascollectedovera20-yearperiodduringwhichanimalhusbandryanddatacollectionprotocolsremained consistent.Potentialre-users ofthe dataareprivate-sectorprofessionals, farmer associations,andresearchers interested in developingstatistical and mechanisticmodelsand simulations of individual dairy cows under low-input grasslandbasedsystems.