الفهرس 
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Abstract
This study was carried out on private dairy farms at El. Ramses project at El salehia Elgedida.
Sami Asaad dairy farm at Abu-Hammad city This work included five experiments: 1- First experiment: Studying the behaviour of dairy cows
under two housing systems.
The obtained results in this experiment indicated the following:
1- The loose housed dairy cows spent more time (min.) and
frequency in eating, drinking and rumination than the tied dairy
cows (p~ 0.05).
2- The loose housed dairy cows spent more time (min.) in urination
and defecation than tied dairy cows (p~ 0.05).
3- There was a significant difference (p~ 0.05) in standing, lying
time, frequency between loose housed dairy cows and the tethered one. As the loose dairy cows spent less time in these activities.
4- There was a significant difference (p~ (’).05) in time, frequencies
of grooming and aggression between loose housed dairy cows
and tied dairy cows, as the loose housed dairy cows had more
time and frequencies in grooming behaviour and more time and
frequency in aggressive behaviour than tied one.