The present study aimed to determine the effect of calving interval, days open and dry period on the
reproductive, productive and economic efficiency of dairy farms under Egyptian conditions. This
study was carried out through field survey in different regions of Egypt include (Menofia, Kaliobeia
and El Giza province) during the period extended from May 2009 to October 2011 on random
samples of dairy production sectors. These sectors were individual Farmers (Fallah), Private farms
and Governmental farms. The dairy breeds included in this study were Balady (local breed), HolsteinFriesian (exotic breed), and Cross-bred (Balady X Friesian). The reproductive, productive and
economic data were collected from a cross-sectional and longitudinal and field survey. the value of
total return and net profit differ significantly at (P |
