الفهرس 
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Abstract
This study was conducted at the Third Field Army Farm, Suez Governorate, Egypt during the two seasons of 2016/2017 and 2017 /2018 aiming to study the effect of chemical NPK and different sources of organic fertilization (farmyard, goats and compost) as well as different sources of bio-fertilization such as active dry yeast, nitrogen fixation bacteria (microbien), potassumage (as a potassium dissolving bacteria), NPK natural as a natural source of NPK, biohyomean (as a natural source of nitrogen fixation bacteria, phosphate dissolving bacteria, and potassium dissolving bacteria) and their combinations on vegetative growth, herb yield and essential oil production as well as chemical composition of Thyme plants (Thymus vulgaris, L). The obtained results could be summarized as follows : 1- Data presented in Tables (6, 7, 8 and 9) indicated that providing thyme plants with different sources of organic fertilization (FYM, Goats, Compost) at rat of 20 m3 /fed., (microbein + potassumag + yeast), (microbein + potassumag + yeast + NPK natural), (microbein + potassumag + yeast + biohyomean) and their combinations improve in most cases the vegetative growth characters expressed as plant height, number of branches, herb fresh and dry weights compared with control. The highestvalues of vegetative growth characters resulted from the plants fertilized with recommended chemical NPK and 20 m3 /fed. Compost in combination with microbien + potassumag + yeast + biohyomean in both cuts of the two seasons. 2- The essential oil percentage and content in the dried leaves of thyme plants varied from one treatment to other (Tables 10 and 11). The highest increasing in oil percentage were obtained from fertilized plants with compost 20 m3 /fed. combined with (microbein + botathiomag + yeast + biohyomen) which were (15.33, 15.33 and 15.33, 15.33 %) for two cuts during the two seasons, respectively, whereas same treatment achieved the most increments of essential oil content cc/plant in the two cuts for two seasons and the differences were significant in comparison with those obtained by control plants, (32.12, 32.41 cc/plant in the first season and 31.41, 32.56 cc/plant in the second season). 3- The obtained data revealed that the fertilized plants with different sources of organic fertilization at rate of 20 m3 /fed. achieved better increments concerning all measurements, but the highest rate of them compost at rate of 20 m3 /fed. was the best over remain rates of organic fertilization, solely compared with control, while the compost 20 m3 /fed. in combination with micronien + potassumage + yeast + NPK natural resulted the highest values of chlorophyll A content, nitrogen, phosphorus and potassium percentages, while the combinations of compost 20 m3 /fed. + microbien + potassumage + yeast + biohyomean caused the best results of total carbohydrate, chlorophyll B and carotenoids in leaves compared with control plants and other treatments in this respect for both cuts in the two seasons. CONCLUSION : It can be recommended to fertilize thyme plants grown in a reclaimed lands with 20 m3 /feddan compost added during preparing the soil, in combinations with bio-fertilizers microbein which it is a mixture of (Azotobacter chroococcum, Azospirillum lipoferum, Pseudomonas sp., Rhizobium sp. and Bacillus megatherium) as a nitrogen fixing bacteria, potassumag as apotassume dissolving bacteria, yeast and bio-hyomien to obtain the best growth and essential oil yield.