title: [Method for computing the milk losses from sterility in cows].
abstract: An attempt was made to work out a method and establish the indices in calculating the losses of milk due to sterility in cows, along with recording the level of productivity and the duration of the period of sterility. The differences were established between: 1. The size of the average daily milk yield per normative day (a day of the period between calvings of 365 days) and that per day of the actual period between calvings. 2. The average daily milk yield per normative day and that per day of the period of sterility. The milk losses calculated in both ways gave almost comparable results. It is , therefore, suggested when calculating the losses due to sterility to use the established indices of milk losses per sterility day (Table 2) at a varying milkiness of the cows and a varying length of the period between calvings, resp., the period of sterility.
mesh_terms: D000818:Animals; D002031:Bulgaria; D002417:Cattle; D002418:Cattle Diseases / Q000503:physiopathology*; D003612:Dairying / Q000379:methods; D004467:Economics; D005260:Female; D007247:Infertility, Female / Q000662:veterinary*; D007775:Lactation Disorders / Q000662:veterinary; D008892:Milk; D011247:Pregnancy; D013997:Time Factors
vernacular_title: Metod za izchisliavane zagubite ot mliako pri bezplodieto po kravite.