This experiment was carried out during two successive seasons 2015 and 2016 on the orchard of Faculty of Agriculture, Assiut University. This study aimed to investigate the effect of potassium sulfate (K) fertilizer at different rates, application times and method of application on yield parameters and fruit properties of old trees of Balady orange cv. The obtained results showed that all K treatments significantly increased the fruit set (%), number of fruits/tree, total yield/tree (kg), fruit weight (g), fruit height and diameter (cm) as compared with control (untreated trees) during both experimental seasons. Moreover, the three times applications and foliar sprays were more effective than twice applications and ground adding of potassium sulfate (K), respectively. The lowest values of these parameters, were recorded in control (untreated trees), while the foliar application of 666 g + 90 mlsprays /tree of potassium sulfate (K) three times gave the highest values during both tested seasons.

Investigation was carried out during two consecutive seasons of 2017 and 2018 on ten grape cultivars namely Thomson Seedless ,Ruby Seedless (KingRuby), Red Roomy, Provano ,Black Moskate , Polomino , Rich Baba,Beauty Seedless, Bez El Naka and Bez El Anza grown in the orchard of Pomology Department at the Faculty of Agriculture, Assiut University .This study aimed to evaluate this cultivars regarding vegetative growth .The illustrated data revealed that, the average shoot length progressively increased with increasing the period of time. The last dates of estimation showed a slower increase of shoot length comparing with the earlier dates. Rich Baba and Ruby Seedless represented also higher values (80.41 and 80.1 cm2 , respectively) with no significant differences between them, however Bez-El-Anza exhibited the lowest value (49.54 cm2 ).Provano grape cultivar gave the highest pruning weight followed by Red Roomy and then Bez-El-Naka. The present study revealed that there were great differences between the studied grape cultivars

This study was conducted during two successive seasons 2017 and 2018 to study the effect of some oils immersing on the storability and quality of Balady mandarin (Citrus reticulate L.) fruits during the storage period. The post-harvest treatments were immersed with camphor oil, linen oil and imazalil either singly or in combination. The fruits were stored at cold condition 8±1°C with 85-90% RH. Samples of each treatment were randomly withdrawn monthly for 4 months. The results showed that fruit weight loss %, fruit decay %, total soluble solids %, sugar contents and TSS/acid ratio were significantly increased with prolonging the storage period. On other hand, the advanced storage period induced a gradual decrease of fruit juice percentage, fruits firmness, acidity % and vitamin C. All treatments caused a decrease in fruit weight and fruit decay percentage, fruits firmness, acidity % and vitamin C. Using oils resulted in the least fruit weight loss, whereas, imazalil treatment had the least fruit decay percentage. Also, all treatments improved the fruit quality during the storage period compared control. It could be concluded that oils plus imazalil coating maintained fruit freshness without negative effects of fruit quality parameters and seems to be the proper and ideal treatment to prolong cold storage of Balady mandarin fruits without great reduction in fruit quality.

This study was carried out during two consecutive seasons of 2013/2014 and 2014/2015 on the third and fourth ration of Williams banana plants. The plants are grown in a private Orchard located at Kom Ombo city, Aswan Governorate, Egypt. The compost as an organic fertilizer, enriched with EM or bio-mex was used as a partial replacement for the mineral-N fertilizer. The experiment was set up as a complete randomized block design. The results revealed that using the recommended dose of nitrogen (RDN) via 25% as a mineral source and 25 to 50% as an organic one enriched with 50 or 25% of EM or bio-mex significantly enhanced the length and circumference of pseudostem, leaf area and total leaf area/plant as well as percentage of N, P and K of leaves compared to use the RDN only as a mineral N fertilizer. Also, the N fertilization with a combination of mineral and organic N sources with a bio-fertilizer significantly increased the bunch weight and hand weight consequently increased the yield/plant, as well as improved the fruit quality compared to use the RDN only as a mineral source. The promotion on such growth and fruiting traits was associated with increasing percentage of bio-form from 25 to 50%. The organic fertilizer enriched with bio-mex significantly stimulated these traits more than its use with EM. It is evident that such N fertilization program is very important for the banana fruit production. It improve the nutrient status, yield and fruit quality of banana plants. In addition, it minimizes the production costs and environmental pollution which could be occurred with using chemical fertilizers

This study was carried out through 2014 and 2015 seasons to evaluate some seeded dry date palm grown in Aswan governorate, Egypt. Their local name, Abd elnaby 1, 2, 3, El-masry 1, 2, Khaled ebn elwalid, Abas gaffer, Radwan and Ali Aamer date palm compared to Sakkoty cv. which is one of the commercial dry cultivar vegetative traits. Yield components and fruit quality as well as numerical evaluation and molecular genetics were investigated. The obtained results indicated that Ali Aamer date palm type had the highest values of most studied vegetative traits compared to the other studied types. On the other hand, the least values of such traits were recorded of Sakkoty cultivar. El-masry 2 type gave the highest yield components followed by Khaled ebn elwalid and Radwan types, whereas, Abd elnaby 1 gave the least one compared to other studied types. No significant difference was found among Abd elnaby 2, Ali Aamer and Sakkoty cultivar. Khaled ebn elwalid type had the highest values of fruit quality followed by El-masry and Abas gaffer types, whereas, Sakkoty cultivar gave the lowest one compared to the other studied types. As the numerical evaluation of date palm types, it could be arranged in a descendingly order as follows: Khaled ebn elwalid (86.2), El-masry 2 (84.4), Ali Aamer (81.5), Abas gaffer (80.9), Radwan (77.9), El-masry 1 (77.3), Abd elnaby 3 (76.8), Abd elnaby 2 (72.7), Sakkoty (68.2) and Abd elnaby 1 (67.7 units). The ISSR data were used to estimate the genetic similarity among the nine date palm strains by using UPGMA computer analysis. The highest similarity index (1.0) was recorded between Abd elnaby 1 and Abas gaffer, while the lowest similarity index was detected (0.0) between El-masry 2 and Ali Aamer. A dendrogram for the genetic relationship among the nine date palm strains was found. These results revealed that seeded date palm named El-masry 2, Abas gaffer, Khaled ebn elwalid, Ali Amer and Radwan are considered promising to be new strains to obtain a high yield with good fruit quality compared to Sakkoty date palm cultivar

This study was carried out at the Experimental Orchard, Faculty of Agriculture, Assiut University, Egypt, to study the effect of GA3, calcium chloride and vapor guard spraying on fruiting of Manfalouty pomegranate during 2014 and 2015 seasons. The experiment was set up in a complete randomized block design with three replicates, one tree per each. GA3, calcium chloride and vapor guard spraying significantly increased the yield/tree compared to unsprayed ones. GA3 spraying gave the highest yield followed by calcium chloride. On the other hand, all treatments significantly decreased the fruit cracking percentage compared to unsprayed ones. The least fruit cracking was recorded due to calcium chloride spraying. All treatments significantly increased fruit weight and fruit dimensions as well as aril percentage and juice contents compared to unsprayed ones. Moreover, calcium chloride and vapor guard significantly improved the fruit chemical constituents, whereas, GA3 spraying decreased the chemical fruit constituents compared to unsprayed ones. It could be concluded that spraying Manfalouty pomegranate trees with calcium chloride at 40 or 80 ml/L at 1 st July was necessary to get high yield, reduce the fruit cracking percentage and improve fruit quality

This study was conducted during two successive seasons of 2018 and 2019 on Balady Mandarin trees, 20 years old budded on sour orange rootstock and planted at 5×5m apart. Grown at the productive farm located at Shandawel Island, Sohag governorate. This experiment aimed to study the effect of active dryyeast, ascorbic acid, vitamin B complex and their combination on yield components, alternate bearing and fruit quality of Balady Mandarin cultivar grown under Sohage conditions. The obtained results showed that using of active dry yeast at 10g/l (as soil application) as single application or in combination with ascorbic acid and vitamin B complex at 1g/l from each (foliar application) caused a pronounced increasing of fruit numbers, fruit weight (g) and yield (kg). The later also improved fruit quality in terms of TSS%, TSS/acid ratio as well as total sugars, vitamin C content and reducing total acidity of Balady Mandarin fruits. According to results of the current study it could be concluded that using active dry yeast at 10g/l (as soil application) as single treatment or in combination with spraying ascorbic acid (1g/l) plus vitamin B complex (1g/l) three times on the first week of May, July and September led to improve both yield and fruit quality of Balady Mandarin Cultivar under Sohage environmental conditions.

This experiment was carried out at the Experimental Orchard of Assiut University, Faculty of Agriculture during two successive seasons 2018 and 2019 on 13 years old grapevines of White Banaty (Thompson Seedless) grape cultivar. The experiment aimed to examine the effect of GA3 at different concentration (10, 20, 40 ppm and 10 +20 + 40 ppm) and caffeic acid as alternative, safety compound at different concentration (1, 2, 3 g / litter and 1 +2 + 3 g/Litter) on yield and fruit quality of Thompson Seedless grape cultivar. The obtained results revealed that spraying the clusters with GA3 at 10 + 20 +40 ppm gave the highest values of yield components and increased total acidity % while it decreased fruit quality. On the other hand, spraying caffeic acid at 2 g/Litter at full bloom was effective in improving yield, bunch, berry weight and berry quality.This study concluded that the beneficial effects of spraying caffeic acid (CA) at 2 g/Litter at full bloom as a new alternative compound to improve yield and fruit quality of White Banaty (Thompson Seedless) grape cultivar.

This study was conducted during 2017 and 2018 seasons on Barhee date palm cv. (Phoenix dactylifera L.) at the age of 18 years, grownin three regions of Upper Egypt i.eMatana, Luxor Governorate; Kom- Ombo and Toshka, Aswan Governorate to evaluate its vegetative properties as well as physical properties and determination chemical composition of fruits. The obtained results revealed that, there were significant differences between the vegetative characteristics of date palm Barhee cv. as a result of different weather conditions of locations conducted study.The palms grown in Matana region recorded the largest values of the palm girth, number of leaves, length of the leaf and leaflet, leaflet area, spines number and area, while the lowest values of these parameters were obtained the palms grown in Toshka region. There are significant differences between the yield components as a result of growing Barhee in the three regions of Upper Egypt. The date palm grown in Matana recorded the largest values related to the number of bunches, the percentage of the initial and horticultural fruit set, the weight of the bunch, as well as the yield/ palm, while the lowest values were obtained in the case of Barhee grown in Toshka. There were significant differences of both physical and chemical fruits properties harvested from different regions of study. Barhee in Kom-Ombo region recorded the largest values of fruit length, fruit shape index, fruit weight, specific gravity of fruit, weight and percentage of flesh in the two study seasons.the highest values of TSS percentages, total and reducing sugars, Nitrogen, Phosphorus and Potassium content and lowest tannins content .On the other hand, the highest values of non-reducing sugars, the highest moisture content, and the lowest acidity were obtained in the case of Barhee in Toshka region. Generally, the productivity and quality of Barhee palm could be arranged descendinglly as follows: Kom-Ombo, Matana and Toshka.

The present investigation was carried out during 2013, 2014 and 2015 seasons to study the effect of plant extracts on growth and fruiting of Flame Seedless grapevines. The experiment was arranged in a randomized complete block design in which the study involved seven treatments with three replications, two vines each .Pruning wood weight, leaf area and leaf chlorophyll were significantly increased by spraying either garlic, turmeric or roselle extracts compared to unsprayed ones. Spraying garlic, turmeric or roselle extracts were very effective in improvement the yield/vine and cluster traits. Moreover, these treatments significantly improved the berry quality in terms of increasing the berry weight, total soluble solids and anthocyanin in skin of berries compared to unsprayed ones .The best results were obtained on the vines that sprayed with 0.2% turmeric extract .No significant differences were obtained among the tested extract. It could be concluded that spraying turmeric,  roselle  or garlic extract at 0.1% three times annually was necessary to get high yield with good cluster and berry quality of Flame Seedless grapevines.