Two field experiments were carried out at Sids Agric. Res. Station, Beni-Suef Governorate, in 2007 and 2008 seasons, to study response of growth, fruiting and yield of the Egyptian cotton cultivar Giza 80 (G. barbadense L.) to foliar application with indole acetic acid (IAA) and Kinetin (a synthetic cytokinin). Besides the control treatment, two concentrations of each of IAA (25 and 50 ppm) and kinetin (10 and 20 ppm) and their combinations were application twice, at the start and peak of flowering stages. Results revealed that, cotton plants treated with various treatments of IAA and/or kinetin showed higher leaves content of chlorophyll a, b and total chlorophylls than those of untreated ones. However, only some treatments of IAA and/or kinetin significantly increased plant height, numbers of fruiting branches/plant and open bolls/plant in both seasons; number of main stem nodes and seed cotton yield/fad., in 2007 season only; and total fruiting sites/plant and seed index in 2008 season only, but they significantly decreased fruit shedding% and earliness% in 2007 season only. Application 50 ppm IAA alone significantly decreased earliness% in 2007 season, and either alone or with kinetin at both levels gave the highest values of plant growth parameters, but their effects on fruit shedding and yield did not reach the significant level. In general, the most consistently positive effects on plant fruiting and seed cotton yield were given by application 25 ppm IAA alone or 20 ppm kinetin alone or both.

Two field experiments were carried out at Sids Agric. Res. Station, Beni-Suef Governorate, in 2007 and 2008 seasons. The experiment was conducted to evaluate the effect of foliar feeding with B and/or Zn on growth and productivity of the Egyptian cotton Giza 80 cultivar (G. barbadense L.,) to study response of growth, fruiting and yield. Besides the control treatment, two concentrations of both boron (85 and 170 ppm) and zinc (180 and 360 ppm) and their combinations were applied twice; at the start and peak of flowering. The experimental design was randomized complete blocks with four replications. Results revealed that, spraying boron and zinc either separately or in combination generally showed some positive effects on cotton growth, fruiting and yield in comparison with untreated control in both seasons, but such as some of their treatments significantly increased only plant height and number of fruiting branches/plant in 2007 season; number of open bolls/plant, boll weight and seed cotton yield/fad. in both seasons and seed index in 2008 season and significantly decreased fruit shedding % in 2008 season. Across the two studied seasons, the combined application of 85 ppm B and either 180 or 360 ppm Zn exerted the most consistently positive effects on cotton growth and fruiting and gave the highest seed cotton yield. The higher levels of either B or Zn (170 ppm B or 360 ppm Zn) showed no more benefits than those obtained of the lower ones (85 ppm B or 180 ppm Zn), rather than it tended to reduce them in case of boron. It could be concluded from this study that yield of Giza 80 cotton cultivar might be increased by spraying 85 ppm boron + 180 ppm zinc under the environmental conditions of this study or similar of them.

The current study was conducted during two seasons, 2018 and 2019, to determine the optimal coupling of hydroponic systems with magnetized water levels (MWLs) to improve irrigation water characteristics, water productivity and lettuce production quality. Three hydroponic nutrient film technique (NFT; tower aeroponic and pyramidal aeroponic) systems and three levels of magnetic units (magnetized water level 1; MWL1 = 3800 gauss, level 2; MWL2 = 5250 gauss, level 3; MWL3 = 6300 gauss, and regular water (RW) was represented as a control) were tested. There was an increase in total dissolved solids (TDS) and a decrease in pH of water by increasing the magnetic level over time during the irrigation period. Maximum contents of nitrogen (N; 72.8 ppm), phosphorus (P; 223.3 ppm), and potassium (K; 425.0 ppm) were recorded in nutrient solution under irrigation with MWL3. The increase in magnetic intensity resulted in lower water consumption in all hydroponic systems compared to control. On the other hand, tower and pyramidal systems consumed less water compared to the NFT system. Maximum water consumption (3719.7 and 4175.4 m 3 ha -1 for both seasons, respectively) was observed in the NFT system under RW. Maximum water productivity was recorded with the integration of NFT system + MWL3 (83.4 kg m -3 ) in the first season and tower system + MWL3 (71.2 kg m -3 ) in the second season. In addition, the highest leaf performance curves and lettuce yield (414 g per head) and its quality (3.50, 0.46, and 7.40 mg L -1 for N, P, and K contents) were recorded with the integration of the NFT system + MWL3 compared to other treatments.

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Due to the scarcity of water, it is necessary to develop an environmentally friendly method for increasing water productivity and crop production. An experiment was conducted to assess the effects of different magnetic levels (magnetic water level 1 (MWL 1) = 3800 Gauss, magnetic water level 2 (MWL 2) = 5250 Gauss, and magnetic water level 3 (MWL 3) = 6300 Gauss, as well as normal water (NW) as a control) in combination with three soilless culture systems (a nutrient film technique (NFT) hydroponics system, a tower aeroponics system, and a pyramidal aeroponics system. The results showed that the utilization of magnetic water had significant effects on the yield and growth of strawberry plants The tower aeroponic system under MWL 3 produced the highest yield and water productivity, with increases of 80.9% and 89%, respectively, over the control. The tower aeroponic system under MWL 3 produced the highest yield and water productivity, with increases of 80.9% and 89%, respectively, over the control. In addition, as compared to the NW, the NFT system increased yield and water productivity by 71.1% and 79.3%, respectively, whilst the pyramidal system increased yield and water productivity by 66.87% and 82%, respectively. Furthermore, when compared to the control, the combination of the NFT system and magnetic water level 3 (MWL 3) resulted in the most leaves, largest stem diameter, and largest leaf area of the strawberry plants resulted in the most leaves, stem diameter, and leaf area of strawberry plants. In comparison to all other treatments, this combination produced the best fruit quality and yield, as well as its constituents, such as titratable acidity, total soluble solids, and fruit hardness. This study found that combining magnetic therapy with soilless culture techniques resulted in increased yield and water productivity. In addition, water and fertigation solution usage in the NFT, tower, and pyramidal systems dropped by 4.8%, 6%, and 4.8%, respectively. Furthermore, it enhanced plant morphology and plant quality.