Abstract:With population increase, lack of conventional fresh water resources and uncertainties due to climate change, there is growing interest in the arid and semi-arid areas to increase groundwater recharge with recycled water. Finding the best locations for artificial recharge of groundwater in such areas is one of the most crucial design steps to guarantee the long life and the sustainability of these projects. This study presents two ways to go about performing analysis; creating a suitability map to find out the suitability of every location on the map and another way is querying the created data sets to obtain a Boolean result of true or false map. These techniques have been applied on Sadat Industrial City which is located in a semi arid area in the western desert fringes of The Nile delta in the north west of Egypt. Thematic layers for number of parameters were prepared from some maps and satellite images and they have been classified, weighted and integrated in ArcGIS environment. By the means of the overlay weighted model in ArcGIS a suitability map which is classified into number of priority zones was obtained and it could be compared with the obtained true-false map of Boolean logic. Both methods suggested mostly the northern parts of the city for groundwater recharge; however the weighted model could give more accurate suitability map while Boolean logic suggested wider ranges of areas. This study recommends Boolean logic as a first estimator for locating the best locations as it is easier and not time consuming, while the overlay weighted model for more accurate results.

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Known, mango fruit is a climacteric and highly perishable fruit that requires specialized postharvest handling to extend its storage life. This research aimed to overcome these problems by demonstrating the impact of the edible coating such as Aloe vera and chitosan, used either separately or in combination form; in cold storage, on the; shelf life, and marketing period of mango fruit. Through two successive seasons 2019 & 2020, the influence of Aloe vera 75%, chitosan 2% was studied on; both physical and chemical properties; of mango fruit (cv. Langra) during cold storage (11 ± 1°C and 85% RH). All treatments prolonged the storage period reached to more than a month nearly 40 days in a good condition while the control reached 30 days only. On the fortieth day, all treatments gave positive effects on fruit storage but the best treatment was the combined Aloe vera with chitosan. This study recommended using the combination of chitosan and Aloe vera with cold storage to prolong the storage period of mango fruit until 40 days in good condition and to overcome the marketing and export abroad problems.

The objective of the research was to improve the properties of grape cuttings to obtain strong and healthy plantlets and overcome the problems they encounter during cultivation in clay and sandy soils to become vigorous and healthy trees without using chemical fertilizer. This experiment investigated how to vermicompost tea and Plant Growth-Promoting Rhizobacteria (PGPR), individually or in mixed form, influenced the characteristics of grape cuttings cultivated in clay and sandy soils. Some physical and chemical parameters for cutting were measured such as parameters of vegetative growth and root, chemical parameters of plant, and soil parameters as CaCo3 % content, and total count bacteria CFU/g. The results proved that the type of soil affected the growth of cuttings. All treatments gave significant differences, compared with the control. Sometimes significant differences were found among treatments on parameters, and sometimes not. In general, the best effect on the growth of the cuttings was in a treatment that included the combination of vermicompost tea and PGPR, whether cultivated in sandy or clay soil, in both successive growing seasons.

This research studied the effects of Plant Growth-Promoting Rhizobacteria (PGPR), and vermicompost tea on the physical and chemical properties of pomegranate (Manfalouty cultivar) fruits during two consecutive seasons, 2020 and 2021. Trees were sprayed with PGPR (3 ml/liter of water), and vermicompost tea (one liter/20 liters of water), and also vermicompost was added (one liter / 5 liters of water) to the soil at a distance of 50 cm from the trunk of the tree, were used in separate or in combined forms, three times a year, the first one in the middle of July (after fruit set), the second after a month of the first application, and the last one after a month of the second. The results showed that all treatments increased and improved all parameters when compared to the control. The physical and chemical properties of the fruits improved to some extent in the second season compared to the first one, which was due to the cumulative effect of vermicompost in the soil. In comparison to the other treatments in the two seasons, the treatment that included three treatments as a mix of foliar application and soil addition had the best effectiveness.