This experiment was carried out during 5102/2016 and 2016/2017 seasons on 15 years old of mango Ewais cultivar trees grown in the Mansoura Horticulture Research Station Experimental Farm located at(latitude 31°07'47.7"N,longitude 31°28'13.7"E)to investigate the efficacy of calcium,cinc and boron foliar application individually or in combinations at different times and concentrations on flowering, yield and fruit quality.The results indicated that,all tested treatments increased reproductive parameters,yield and fruit quality compared with control.Spraying 2.5 ml/L of each calcium,zinc and boron combination increased panicle length and sex ratio,while spraying 2.5 ml/L of boron alone led to an increase in the male and total number of flowers,but,spraying 2.5 ml/L of zinc alone increased the hermaphroditic flowers.Trees sprayed with 2.5 ml/L of calcium individually produced the highest number of fruits and yield per tree followed by boron treatment,but trees sprayed with the combination of three elements gave the highest fruit height,width and volume.Meanwhile,the individual zinc treatment was superior for fruit weight followed by the high level of combination treatment.Foliar application of individual boron or in combination with calcium and zinc improve fruit TSS and TSS/acid ratio and decrease the acidity.Trees sprayed with 2.5ml/L of calcium,zinc and boron in combination resulted the highest values of leaf Ca, Zn and B content followed by1.25ml/Lof the same combination.On the other side, the individual tested elements leads to increasing the corresponding leaf content of each one. It could be recommended that spraying calcium,zinc and boron combination at 2.5ml/L four times is the best treatment for increasing yield and fruit quality

Two field experiments were conducted at Badaway district, Dakahlia Governorate during 2017 and 2018 seasons. This study aimed to investigate the effect of drip irrigation levels of 120, 100% and deficit drip irrigation at 80 % of crop evapotranspiration, drip fertigated nitrogen rates of 100 % (N1) recommended, 80 % (N2) and 60 % (N3) sub recommended rates and their interaction on growth attributes, fruit yield and its components and water use efficiency of clay loam soil cultivated banana plants var. Grand Nain banana. Also to detect levels and rates that save water and nitrogen fertilizer, maximize WUE. The results revealed that, drip irrigation at 80 % ETc level (deficit drip I) save 20 % water, maximize WUE and gave potential effect and high values of growth attributes and significantly high fruit yield and its components similar to / or more than that obtaining by drip irrigation 100 % of ETc recommended level of clay soil cultivated banana plants. 80 % sub recommended drip fertigated nitrogen rate save 20 % nitrogen fertilizer and gave the same effects on banana growth and productivity as drip irrigation level of 80 % ETc. The most potent concluded was 80 % ETc deficit drip irrigation level x 80 % sub recommended drip fertigated nitrogen, which save 20 % irrigation water and 20 % N fertilizer, maximize WUE and gave potential growth attributes, high yield and its components equal significantly to that of 100 % ETc X 100 N (recommended drip irrigation and its fertigated N levels) of clay loam soil cultivated banana plants.

The effects of irrigation water amounts and spraying some amino acids on vegetative growth , fruit and yield of banana plants and water use efficiency under drip irrigation system in clay loam soils By Eid, T. A.