FFECTS of partial or total replacement of inorganic fertilizers by liquid compost (LC) and banana pseudostem sap (BPS) on growth, yield and fruit physical and chemical characteristics of 'Sewy' date palm were investigated in this study. The recommended inorganic fertilization program (2.985 kg ammonium nitrate -0.5 kg mono calcium superphosphate -1 kg potassium sulphate /palm/year) was applied as a control, and five rates of LC and BPS (4, 8, 12, 16 and 10 L/palm) in combination with 80, 60 and 20% of the control. Results show that using 60% inorganic fertilizers + 8 L BPS or LC enhanced vegetative growth in terms of leaf and leaflet parameters, leaf nutritional status, fruit set, yield and fruit physical (weight, diameters, length and flesh weight) and chemical properties (TSS, sugars, acidity, crude fiber, nitrate and nitrite contents). However, using 60% inorganic fertilizers+ 8 L BPS showed the highest significant effect on almost all studied parameters in both seasons. The results suggest that in 'Sewy' date palm, 40 % of inorganic fertilizers can be saved by using 8 L of BPS as a sustainable agricultural practice with improved yield and fruit quality.

This study was carried out during 2018/2019 and 2019/ 2020 seasons. On Valencia orange trees are grown in al kawamil orchard at the faculty of agriculture, sohag university, where the soil texture is sandy. The selected trees had the same vigor. This study aimed to throw some light on the effect of single and combined applications of some antioxidants (300 ppm ascorbic and 300 ppm salicylic acids), 1% magnesium and a mixture of micronutrients (300 ppm Fe, 200 ppm Zn, 200 ppm Mn) on some vegetative growth characters, fruit set %, fruit retention%, tree nutritional status, number of fruits per tree, yield and physical and chemical characteristics of fruits. Selecting the best-combined treatment from these antioxidants, magnesium and micronutrients responsible for gaining an economical yield is considered another target.Single and combined applications of these compounds were very effective in enhancing Main shoot length, shoot thickness, leaf area, fruit set %, Fruit retention%, nutrients in the leaves (N, P, K, Mg, Zn, Fe and Mn), Number of fruits per tree, yield as well as physical and some chemical characteristics of the fruits in relative to the check treatment.The best results about yield quantitively and qualitatively of Valencia orange trees were obtained when the trees received three sprays (growth start, just after fruits setting and one month later) of a mixture containing 300 ppm salicylic acid, micronutrients and 1 % magnesium sulphate).

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This study was conducted during the 2018/2019 and 2019/2020 seasons in a private orchard located at Sohag governorate. To investigate the impact of soil potassium fertilization at 40, 60 and 80 % from recommended rates and foliar spray with Nano-Chitosan-K at 500, 1000 and 1500 ppm, potassium chelate at 0.5, 1 and 1.5 % and potassium Sulphate at (0.5, 1 and 1.5 %) on growth, yield and fruit quality of William banana. Results showed that treatments with soil potassium fertilization plus foliar spray with Nano-Chitosan-K or potassium chelate significantly increased vegetative growth, nutritional status, yield and fruit quality in William banana than other treatments. Application of soil potassium fertilization combined with foliar application of potassium was preferable to using soil potassium to improve yield. Application of soil potassium fertilization combined with foliar application with Nano-Chitosan-K was more effective than potassium chelate and potassium sulfate. The best results for fruit chemical qualities were measured using 60% mineral k plus 1000 ppm Nano-Chitosan-K.