This study was carried out during the two successive seasons of 2012 and 2013 on Manfaloty and Wonderful pomegranate trees at5 and 3-years old respectively, the trees were spaced at 4x4 m. grown in a sandy soil. The highest values of yield and its components i.e., fruit weight, fruit number /tree and yield /tree were recorded when Manfaloty and Wonderful pomegranate trees treated with GA3 at 50 or 100ppm, CaCl2 4 %, kaolin 2.5 or 5 % and bagging treatment. The lowest percentage of fruit creaking and sunburn were obtained with bagging treatment followed by kaolin 5% and spraying by CaCl2 and GA3 treatments compared with the control treatment .All treatments caused a highly significant increase in Marketable fruits %. Bagging treatment gave the highest Marketable fruits percentage compared with the control and other treatments. The highest fruit length and diameter obtained by GA3 50 or 100ppm and CaCl2 2 or 4% treatment. Furthermore,GA3, kaolin and bagging treatments improved SSC, total acidity and SSC/acid ratio ,meanwhile the highest anthocyanin content in juice and peel was obtained by bagging and spraying kaolin 5% treatments in both cultivars. Therefore, these treatments could be recommended for improving Manfaloty and Wonderfull pomegranate cvs performance under similar conditions of this study.

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The present study was carried out during three successive seasons (2011, 2012 and 2013). (the first year was considered as a preliminary trial) on ten years old Flame seedless grape vines cultivated in a private vineyard at 64 th kilometer Cairo-Alexandria desert road. The main of study was to evaluate the effect of using organic fertilizer as compost in combination with or without two natural rocks ; Rock Phosphate and Feldspar. Also three different biofertilizers were used; Biogen (Azotobacter chroococcum) for N, Phosphorien (Bacillus Megathrium) for P and Potasiumag (Bacillus circulans) for K in comparison with the mineral fertilization , yield and its components as ( number of clusters per vine and cluster weight), physical and chemical characteristics of berries, and nitrite and nitrate content in berry juice of Flame seedless grapevine.The results revealed that using combined application of%100 compost, natural rocks and the three biofertilizers of NPK were very effective in increasing yield per vine and per feddan, cluster number per vine and weight, physical and chemical properties of berries were significantly improved. On the other side, Both nitrate and nitrite content in berry juice of Flame seedless grapevines were minimized comparing with the vines received 100% mineral fertilization or 100% compost alone. Furthermore, organic agriculture is very safe for human and environment by reducing pollution via improving soil nutritional status as well as decreasing mineral fertilization and that will be reflected on yield and quality of the grapes.

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The present study was carried out during 2003, 2004 and 2005 seasons on 15 years old Thompson seedless grapevines grown on a clay soil in a private vineyard at EL-Tawela village near Mansoura city, Dakahlia governorate. The aim of the present study was to investigate the effect of addition different sources of organic fertilizers as a partial substitute for nitrogen mineral fertilizers and their effect on bud behaviour, growth, mineral content of the leaves, yield and quality of Thompson Seedless grapevines. Farmyard manure (FYM), rice straw compost (RSC), Damitta town refuses (DTR) and Mansoura town refuses (MTR) were used with mineral nitrogen source (Ammonium sulphate) during this investigation. All vines were received the same nitrogen requirements (80 units of nitrogen per fed), but with replacement of 25, 50 and 75 % of the nitrogen requirements by organic manures (FYM, RSC, DTR and MTR) according to their nitrogen content. The control vines received the nitrogen requirements as mineral alone.The results showed that all combinations from organic nitrogen (sources + doses) with mineral nitrogen doses increased bud burst %, bud fertility %, fruiting coefficient, number of clusters per vine, cluster weight and yield/vine. In addition, SSC % was increased and total acidity was reduced in the berries juice. The data also indicated an improvement of rate of wood maturity, weight of pruning wood per vine and total carbohydrates in the canes as compared with using mineral nitrogen alone. The superiority of this investigation was for DTR at 40 and 60 units + 40 and 20 units of mineral nitrogen per fed which gave the best results.