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agriculture horticulture veterinary livestock management livestock animal production poultry animal management livestock production animal nutrition cattle animal husbandry veterinary medicine animal science buffalo sheep diseases goat ration livestock diseases feed swine livestock nutrition vaccination crude protein concentrate cross breeding nellore breed animal rearing inbreeding goat breeds swine breeds poultry breeds duck breeds quail breeds genetic improvement care and management calves heifers animal genetics and breeding brooding incubation milch animals hatching livestock census mithun indian economy demographic distribution buffaloe sheeep reproductive system parturition calving oestrous signs housing systems of livestock loose housing conventional barn housing design and construction housin role of livestock building materials shed construction cement bricks lime breeds feeding buffaloes veterinary management pigs swine diseases sanitation veterinary science formaldehyde treatment microbiology poultry diseases body parts familiarization animal restraining livestock science identification methods tagging ear notching judging of livestock scoring culling ration formulation computation milking methods chicks growers layers debeaking dusting sheep breeds grading up digestion metabolism feed stuff conventional feed non conventional feed proximate principles feed analysis dry matter ether extract crude fiber nutrients carbohydrate protein fats vitamins minerals livestock feed roughage mineral mixture digestible crude protein ration balancing principles rouhgage feed additives poultry management