TY JOUR TI PREVALENCE AND DEGREE OF KETOSIS IN HOLSTEIN COWS IN BREEDING CONDITIONS KW ketosis KW cows KW beta-hydroxybutyric acid KW calving KW metabolic tests KW Holsteins KW Centri Vet GKB ovine analyzer JO Bulletin of KSAU AU Katargin, R.S. AU Sarazhakova, I.M. PY 2023 IS 0 PB Krasnoyarsk State Agrarian University