الفهرس 
INTRODUCTION
Effect of inorganic, organic and biofertilization on vegetative growth characters, leaf chemical composition, yield and fruit quality.Only 14 pages are availabe for public view
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Abstract
This study was carried out during 2008, 2009 and 20 10 seasons on 96 uniform in vigour IS-years old head trained Thompson seedless grapevines grown in a private vineyard located at El- Faroukia village, Samalout district, Minia Governorate. The vineyard soil is clay and well drained and with a water table not less than two meters deep. Winter pruning during each season was conducted on the first week of Jan. by using head pruning system leaving 72 eyes (10 long fruiting .... spurs x six eyes pi us six replacement spurs x two eyes). All the selected vines had the same vine load (72 eyes) and planted at 2.0 x 2.0 m apart. Surface irrigation system was followed.
The main target of this study was examining the impact of different proportions of inorganic N and compost enriched with actinomyces as well as the antioxidant citric acid on some vegetative growth characters, leaf chemical composition, plant pigments, yield as well as physical and chemical properties of Thompson seedless grapes. Finding eut the effect of the present treatments on berry juice content of nitrite (N02) (ppm) was also investigated. Selecting the best combination treatment that responsible for obtaining an economical yield is considered another goal.
The present experiment included 32 different treatments from various N sources and application of citric acid. It was included two factors (A & B). The first factor (A) comprised from the following eight treatments from different N sources:-
Summary and Conclusion
I-Application of the recommended rate of N i.e. 80 g / vine ( R.R.) completely via 100% inorganic form 388 g ammonium sulphate / vine)
2-Application of (R.R.) through 90% inorganic N (349 g ammonium sulphate / vine) + 10 % compost enriched with actinomyces ( 2%N)
(400 g/ vine).
3-Application of (R.R.) through 80% inorganic N (310 g ammonium sulphate / vine) + 20 % compost enriched with actinomyces (800 g/
vine).
4-Application of (R.R~) through 70% inorganic N (272 g ammonium
sulphate / vine) + 30 % compost enriched with actinomyces (1.2 kg/
vine).
5-Application of (R.R.) through 60% inorganic N (233 g ammonium sulphate / vine) + 40 % compost enriched with actinomyces (1.6 kg/
vine).
6-Application of (R.R.) through 50% inorganic N (194 g ammonium
sulphate / vine) + 50 % compost enriched with actinomyces (2.0 kg/
vine).
7-Application of (R.R.) through 40% inorganic N (155 g ammonium
sulphate / vine) + 60 % compost enriched with actinomyces (2.4 kg/
vine).
8-Biofertilization with Bacillus Polymyxa + 75% compost enriched
with actinomyces ( 3.0 kg / vine)
The second factor (B) comprised from four concentrations of
citric acid namely at) 0.0 ppm , a2) 500 ppm, a3) 1000 ppm and a4)
2000 ppm.