[PDF][PDF] Influence of age at first calving on milk quantity at Holstein-Friesian cows
Z Shindarska, G Popov, I Ralchev - IntJCurrMicrobiolAppSci, 2016 - researchgate.net
The age of first calving is one of the main factors influencing the total milk in cows on first
lactation. From the factor “age” depends on the realization of genetic potential for high milk …
lactation. From the factor “age” depends on the realization of genetic potential for high milk …
[PDF][PDF] Reproductive and Productive Indicators of Holstein-Friesian cows grown in cubical technology
G Popov, Z Shindarska, I Ralchev - Int J Curr Microbiol App Sci, 2016 - researchgate.net
Over the last ten years a number of studies on reproductive and productive performance of
dairy cows are held. Results of them are too contradictory (Dematawewa 1998; Pursley et …
dairy cows are held. Results of them are too contradictory (Dematawewa 1998; Pursley et …