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Early selection of dairy cows. V. Effect of age at 1st calving on milk yields in subsequent lactations, and yield increase ratios in different groups of cows



Early selection of dairy cows. V. Effect of age at 1st calving on milk yields in subsequent lactations, and yield increase ratios in different groups of cows



Pol'nohospodarstvo. 17: 11/12, 1011-1018



Distribution of (i) and (ii) cows (see preceding abstr.) according to yield in max.-yield lactation showed that none of the 41 (I) cows exceeded a yield of 4800 kg in their max.

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