الفهرس 
The number of records for dairy breeds that collected according to calvingOnly 14 pages are availabe for public view
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Abstract
The profitability of a dairy enterprise depends on reproductive efficiency and obtaining a high level of milk production as possible within local nutritional constraints relative to the maintenance cost of animals. The dairy production plays a vital role in improving people’s nutritional status, generating income to farmers and improving soil fertility through manure application. With recent global trends, competitiveness of milk production is of great importance, where the question on who will produce the cheapest milk in the future? needs to be answered. This means that the costs of dairy production must be low enough to eliminate foreign competition and at the same time, returns from dairying need to be satisfactory for the farmers so that they are motivated to stay in business. This becomes a great challenge for African countries especially as the WTO (World Trade Organization), in its struggle for liberalization, is working towards a reduction or elimination of trade barriers on dairy products. This means that the cheapest producers will gain a global dairy market in future. This study was carried out in Menofia province during the period extended from summer 2005 to winter 2010 on random samples of dairy production sectors.