Longevity of cows depending on their first lactation yield and herd production level
A Sawa, M Bogucki - Annals of Animal Science, 2017 - sciendo.com
The effect of first lactation yield and herd production level on longevity was studied using
data from the SYMLEK database on 12045 Polish Holstein-Friesian cows in 1371 farms from …
data from the SYMLEK database on 12045 Polish Holstein-Friesian cows in 1371 farms from …
Analysis of productivity, longevity and culling causes of Jersey and Polish Holstein-Friesian (PHF) cows
A Nienartowicz-Zdrojewska… - African Journal of …, 2012 - ajol.info
The analyzed population comprised 970 Polish holstein-friesian cows (PHF) and 372 Jersey
cows. The database provided pedigree information on dams and their productivity …
cows. The database provided pedigree information on dams and their productivity …