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Two pot experiments were carried out during two seasons of 2014 and 2015 on four grapevine rootstocks namely, Salt creek, Freedom, 1103 Paulsen and Harmony under shad (siran) house at pomology department, Fac. of Agric., Cairo Univ., Egypt. This study aimed to investigate the efficiency of previous rootstocks in uptake nitrogen and potassium nutrients as their effect on growth parameters. Four nitrogen and potassium rates (0.0, 0.4, 0.8, and 1.2 g N or K2O/pot) were added separately in the two separate experiments and each rate was divided into six equal doses which added weekly. Freedom rootstock recorded the highest growth vigor parameters with regard to shoot and root length and dry weight followed by Salt Creek rootstocks all along both experiments. Also, Freedom recorded the highest significant leaf area in the first season in both experiments. Moreover, Freedom rootstock contained the highest nitrogen and potassium content in shoot and root tissues. Furthermore, the highest nutrient dosages (0.8 and 1.2 g/pot) recorded the highest growth parameter, chlorophyll, nitrogen and potassium content. This study showed an additional advantage for Freedom rootstock in uptake and utilization of nitrogen and potassium nutrients.

This experiment was carried out during 2014 and 2015 seasons on 'Canino' apricot trees grown in sandy soil under drip irrigation system in a private farm at El-Bostan region in Behera governorate, Egypt to study the effect of foliar spraying with Yeast (0.1 and 0.2%), Benzyladenine (50 and 100 ppm), GA3 (50 and 100 ppm), Boric acid (25 and 50 ppm) and flower power (2 and 4%) at full bloom stage on fruit set and fruit quality. Results showed that spraying 'Canino' trees with BA at 100 ppm followed by Boric acid (25 ppm) as well as GA3 (50 ppm) gave the highest significant fruit set in comparison to control. Fruit weight, volume, length, width and fruit flush weight were significantly increased as result of GA3 at 50 ppm, Flower power (4%) and GA3 (100 ppm) treatments respectively. Moreover, firmness of fruits obtained from BA at 50 ppm and Flower power at 4% treatments were significantly higher than control. The data also reveal that applied treatments had no significant effect on fruit shape index (L/W). Concerning the results of fruit kernel properties, it was noticed that, GA3 at 50 ppm, boric acid (25 ppm) and flower power (2%) treatments were more effective to enhance 'Canion' kernel properties. Treatments of BA at 100 ppm and Yeast at 0.1 % as well as Flower power at 4% increased SSC (%) and SSC/acid ratio. However, all treatments significantly decreased acidity percentage comparing with control fruits. It can be concluded that, most of the studied parameters were enhanced with foliar applications of GA3 at 50 ppm, BA at 100 ppm and Flower power at 4% at full bloom stage of 'Canino' apricot trees in comparison with control treatment.

The possibility of replacement compost as peat moss in olive propagation media (PM) and it's impact on growth was investigated during both 2013 and 2014 seasons. Semi-hardwood stems cuttings of Coratina olive cultivar prepared in April and August of both seasons. The basal portion of each cutting was immersed 4000 ppm indole butyric acid before planting. Propagation media (Treatments) consist of: sphagnum peat-moss: sand in one ratio (1:3) as a control and plant composting: sand

This study was carried to improve flowering, productivity and fruit quality of the Ewais mango cultivar by foliar spraying with Nano-chitosan and Nano-potassium silicate. This trial included seven treatments, before flowering selected trees were sprayed with Nano-chitosan at 50, 100 or 150 ppm, Nano-potassium silicate at 0.4, 0.6, 0.8g/L and control treatment. Under this experiment conditions, the Ewais mango cultivar showed a positive response to the treatments with Nanoparticles, whether for chitosan or potassium silicate, compared to the untreated trees, which gave the lowest results in the characteristics related to flowering, fruit set, yield, fruiting characteristics and the leaves content of chlorophyll, zinc, and potassium. Spraying Nano-potassium silicate at 0.6 and 0.8 g/L were more effective in increasing panicle length and decreasing floral malformation in addition to achieving the highest yield and the best fruit characteristics as compared with un-treated trees. Also, Nano-potassium silicate at 0.8g/L was more effective in enhancing final fruit set than other treatments. Furthermore, spraying the trees with chitosan at a concentration of 50 or 100 ppm showed the nearest or same results as those achieved with Nano-potassium silicate. Application with Nanoparticles of chitosan at a concentration of 50 or 100 ppm lead to improve leaves content of chlorophyll, zinc, and potassium. It is recommended spraying Ewais mango with Nano-potassium silicate at 0.6g/L or Nano chitosan at 100 ppm which decreased floral malformation and achieved the highest yield & the best fruit characteristics.