Möglichkeiten zur kostensparenden Milchleistungsprüfung – 2. Mitt.: Untersuchungen zur Zuverlässigkeit von aufwandsreduzierten Verfahren zur Feststellung der Laktationsleistung

Abstract. Title of the paper: Possibilities of low cost procedures for estimating milk yields. II. Reliabilitv of the 305 days lactation yields
The increasing expenses of the dairy farmers and control association force's reduction of costs caused by estimating milk yield. As well considerable losses of accuracy are not to accept. Milk yield and contest are tested separate for morning and afternoon in two dairy farms with about 500 milking cows each 14 days This allows the Simulation of different methods for estimating the lactation yield. By these several simulations of Methods for Estimating milk yields and contests are possible. This second Communication shows various variants of estimating total lactation yields (305 days) and their Standard error by 168 lactations in two farms.