الفهرس 
Experiment -1
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Abstract
For studying the relation-ship between bacterial & fungal pollution of air (bacterial & fungal), and several envirnomental factors such as characteristic himidity, ambient temperature, ventilation rate, condition of litter, detectable ammonia and bird density; (102) air samples were collected from 15 broiler and layer farms. Air sampling was carried by techniques of settling plate and slit air sampler (Aeroscope). There is a positive relation between, microbial pollution and characteristic himidity, ventilation rate, condition of litter and bird density.