الفهرس 
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Abstract
The present study was carried out on Origanum syriacum L. subsp. sinaicum (Boiss) family Lamiaceae (Labiatae) in El-Maghara Research Station, Desert Research Center, 90 Km South El-Arish City in the middle of Sinai (North Sinai Governorate) during the two successive seasons of 2004 and 2005.
This investigation included two separate experiments.
1 - The first experiment:
The objective of this work was to study the effect of compost, biofertilizer and active dry yeast, on vegetative growth, oil production and chemical composition of Origanum syriacum L. subsp. sinaicum (Boiss).
2 - The second experiment:
The objective of this work was to study the effect of irrigation levels and planting distances on vegetative growth, oil production and chemical composition of Origanum syriacum L. subsp. sinaicum (Boiss).
3 - Harvesting:
Harvesting was carried out two times, the first cut was in July and the second cut was in November in both seasons.
1- The first experiment:
Effect of compost, biofertilizer and active dry yeast, on vegetative growth, oil production and chemical composition of Origanum syriacum L. subsp. sinaicum (Boiss).