Effect of some non-genetic factors on the productivity and profitability of Holstein Friesian dairy cows.

Background And Aim: Milk yield (MY) is one of the main factors that affect the economic profitability of dairy farms. Thus, increasing the MY per animal and decreasing the feed cost can lead to economic gains, so the objective of this study was to evaluate the effect of dry period length (DPL), days open (DO), and days in milk (DIM) on the productivity and profitability of dairy cow farms.

Materials And Methods: Data used in this study were taken from 3095 lactation records of Friesian dairy cows of private and governmental sectors.