The present study was conducted during consecutive summer season of 2014 and 2015 at a private farm in Kafrelsheikh Governorate, Egypt. This study aimed mainly to investigate the effect of irrigation intervals i.e., 7, 11 and 15 days among irrigations and kaolin foliar application with different concentrations, 0, 2 and 4% on Eggplant cv. Sawad EL Laiel. The shortest irrigation interval 7 days increased the all plant growth parameters under study namely, stem length, branche number, leaf number, leaf area, plant fresh weight and yield components as well as increased the parameters of fruit quality and productivity of irrigation. The kaolin foliar application concentrations improved plant growth, yield and fruit parameters. The highest early and total yields with favorable quality were attained under the shortest period (7 days) with kaolin foliar application at (2%), while the kaolin concentration at 4% under water stress condition (irrigation at 11 or 15 days period) was the best for plant growth, yield, and productivity irrigation with water saving the seasonal applied water than without kaolin or 2% treatments.

The objective of the present study is to investigate effect of phosphorus fertilizer levels and potassium salicylate spraying on tomato growth, yield, quality and curly top virus severity % (TCTV) and incidence. Two field experiments were conducted in a private farm at El-Shamarka, Kafr El-Sheikh district, Kafr El-Sheikh governorate during 2014 and 2015 seasons. Split split plot design was used with four replicates. The main plots were assigned with three phosphorus levels 0, 15 and 30 kg P 2 O 5 fed -1 . The sub plots were assigned with two potassium salicylate treatments of without potassium salicylate but sprayed by potassium 20% K 2 O 1 liter in 200 liter water fed -1 and spraying with potassium salicylate 20% K 2 O, 12.5% salicylate at the rate 300 mg L -1 salicylic of the spraying solution. The sub sub plots were assigned with two biofertilizer treatments of without inoculation and inoculation with phosphate solubilizing bacteria. The results can be summarized as phosphorus at the level of 15 kg P 2 O 5 fed -1 had the highest values of stem length, number of branches/plant, leaves area/plant, dry weight of shoot/plant and total yield (15.39, 16.15 ton fed -1 ) and vitamin C. While, the phosphorus level of 30 kg P 2 O 5 fed -1 had the highest values of early yield (4.51 and 4.39 ton fed -1 ) fruit length, fruit diameter, average fruit weight, TSS, acidity, N%, K% in the shoot and fruits. Potassium salicylate spraying had the highest values of stem length, number of branches/plant, leaves area/plant, dry shoot, dry fruit/plant, early and total yield ton fed -1 , average fruit weight, TSS, acidity, vitamin C and K% in fruits. Phosphate solubilizing bacteria inoculation increased stem length, leaves area/plant, dry shoots and fruit weight, early and total yields, fruit length, fruit diameter, average fruit weight, TSS, acidity and vitamin C, N%, K% in the shoot and fruits. Phosphorus at the level 15 kg P 2 O 5 fed -1 affected curly top virus (TCTV), decreased disease incidence %, disease severity % and increased reduction infection %. Disease severity comparing to the used rating scale (0-4) all the values of P levels from 12.21 up to 19.95% lies in class one (11-20%), this means that effect of P levels on (TCTV) was low. Potassium salicylate spraying decreased disease incidence %, disease severity % and increased reduction infection %. Comparing with the used rating scale clear that the values of K-salicylate (4.43, 9.75%) lies in the class zero (0-10%), while the control (21.79, 25%) lies in class two (21-30%), this means that Ksalicylate spraying was effective in decreasing (TCTV) in tomato.

Two field experiments were conducted through summer seasons of 2016 and 2017 to evaluate application of a mixed inoculation (In)biofertilizer (Bradyrhizobiumsp., B. megatherium and B. circulana) and/or moringa leaf extract (MLE) on yield and parameters of cowpea plant. The following parameters were determined: plant height (cm), number of branches/plant, number of leaves/plant, leaf area, fresh weight, dry weight of plant, peduncle number/plant, number of total pods/plant, weight of pods/plant, seeds yield, seeds yield (kg/fed.) and weight of 100 seeds. Also, the percentages of protein, ash, fats and fibers were estimated. The results generally, showed no significant increases for those characteristics due to mixture biological inoculation, although, the mineral fertilizers used with inoculated treatments were very low compared to not inoculated-chemical fertilized control (100% NPK), inoculation treatments were received 25% N, 50% P and 50% K. While the cowpea seeds treatment with moringa leaf extract before planting induced significant increases in these traits over control. Moreover, the application of moringa leaf extract as seeds treatment and foliar spraying were significantly increased these characteristics over not treated (control) and seeds treatments too. The treatment of inoculation with seed treatment and spaying with moringa leaf extract at 25% N, 50% PK [In (25% N + 50% PK) + S + M] was the best in this context which attained the highest records in all studied yield components especially seed yield (1263.8 kg/fed.) that represent the highest seed yield. The economic analysis for data of this experiment revealed that this treatment was also the most economic one, whereas exhibited the highest net return (8938.52L.E./fed.

Soilless agriculture is one of the most promising systems because its advantages like saving irrigation water, benefiting from unsuitable land for agriculture or agriculture of building roofs for production of food as well as decreasing pesticide application or mineral fertilizers. Organic fertilization contributes also in decreasing hazardous side effects of using chemical fertilizers. The aiming of this investigation was to study of using organic fertilization system by adding compost as a source of fertilizer, irrigate the plants with fish extract at rate of 1:100 and spraying the plants with moringa leaf extract and the influence of that on cherry tomato plant growth, fruit yield and its quality. The results of the present investigation showed that compost application in vermiculite improved yield and quality of cherry tomato fruits (Guindo F1), especially at 400 and 500 g/plant levels, which increased plant length, number of leaves and leaf area/plant, total fruit yield, average fruit weight, fruit diameter, vitamin C, TSS, N, P and K percentages. While decreased the stem thickness, and titratable acidity percentage in tomato fruits. Foliar application with moringa leaf extract exhibited a positive influence on the previous studied parameters. The interactions between organic fertilization and moringa leaf extracthighly increased these parameters. The highest total fruit yield was obtained from 400 g compost/plant as well as fertigation with fish extract and sprayed with moringa leaf extract, it gave 5.436 and 5.054 fruits kg/plant compared to the control treatment (chemical fertilization, without moringa leaf extract spray) which obtained 3.765 and 4.201 kg/plant for the first and the second season, respectively.