An experiment trial was carried out in a private orchard at Ras-Sudr, South Sinai Governorate, Egypt, during the two successive seasons of 2012 and 2013 to study the effect of effective microorganisms biofertilizer (EM) at 60 and 90 ml/palm/year and potassium sulphate at 1 and 1.5 kg/palm/year as well as their combinations in alleviating the adverse effect of salinity on productivity of "Hayany" date palm. From the obtained results showed that it is preferable to add EM at 90ml / palm/ year combined with potassium sulphate at 1.5kg/palm/year as a soil application divided into three equal doses applied at three times a year to enhance leaf chlorophyll content, fruit set percentage, retained fruit percentage, yield, fruit quality and leaf minerals content of "Hayany" date palm.

A two-year trial was conducted during 2017 and 2018 seasons on Wonderful pomegranate orchard about 7 years old grown in sandy soil under drip irrigation system from well at private orchard located on Cairo-Alexandria desert road (about 50km from Cairo), Egypt. Potassium fertilizer at 250 and 350g /tree/ year alone and/or humic acid at 20 and 30g/ tree/year, added as a soil application divided into two equal doses applied at two times a year in the first week of May and July in both seasons. Generally, all tested treatments enhanced leaf characteristics, yield and fruit quality traits as well as improved fruit marketable and minimized cracked fruit percentage and sunburned fruit percentage. Moreover, soil application of potassium at 350g /tree/ year combined with humic acid at 30g/tree/year, proved to be the most efficient treatment in this respect.

AN experiment trial was carried out during 2017 and 2018 seasons on Wonderful pomegranate trees about 7 years old grown in sandy soil under drip irrigation system from well at private orchard located on Cairo-Alexandria desert road (about 50 km from Cairo), Egypt. Treatments of salicylic acid (50,100 and 150 ppm), ascorbic acid (500, 750 and 1000 ppm) and tap water control were foliar sprayed twice a year i.e. at full bloom and four weeks later. Abstractly, salicylic and ascorbic acid treatments enhanced leaf characteristics, yield and fruit quality traits as well as minimized sunburned and cracked fruit percentages. Ascorbic acid treatment at 1000 ppm proved to be most efficient treatment in this respect.

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The investigation was carried out during 2017and 2018 seasons on Wonderful pomegranate trees grown at private orchard located on Cairo-Alexandria Desert road about 50 Km from Cairo, Egypt. Trees planted at 3x5 meters apart in sandy soil and watered from wells using drip irrigation system. The trial was a factorial experiment, hence sustained deficit irrigation100%, 80% and 60% from crop evapotranspiration (ETc) throughout season, the occupied main plot, whereas foliar sprays of ascorbic acid treatments at 0, 500, 750 and 1000 ppm /tree located in the subplots were carried out two times, the first foliar spray was done at full bloom and the second one was performed four weeks later. The results showed that leaf characteristics (leaf area and total chlorophyll), number of fruits per tree, yield and fruit quality traits (weigh, length, diameter, weight of fruit grains, flesh percentage, weight of 100 grains and juice volume) recorded the highest values with higher both irrigation level and sprays of ascorbic acid treatments. On the contrary fruits cracked percentage and fruits sunburned percentage, peel thickness, total sugar, TSS, TSS/acidity, ascorbic acid and water used efficiency showed an adverse correlation with irrigation level. Also, spraying by ascorbic acid is reducing number of fruit cracked, number of sunburned fruits and acidity. On other hand, peel thickness, total sugar, TSS, TSS/acidity and ascorbic acid concentration were increasing. Therefore, sustained deficit irrigation is considered to be an effective strategy for arid and semi-arid regions, moreover ascorbic acid may be used to prevent or mitigate oxidative damage caused by sustained deficit irrigation.