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This study was carried out in a private orchard located in Biala, Kafr El-Sheikh governorate, Egypt to investigate the effect of Nano-fertilizers versus chemical fertilizers on the growth and productivity of Valencia orange. Two rates of Nano-fertilizers (11.45 and 19.8 g/tree) were applied to the soil, foliar, or mixed, resulting in six treatments, with chemical fertilizers (0.55, 0.12, 0.46 Kg of N, P2O5, and K2O/tree/year, respectively) serving as the control. When compared to the control, Nano-fertilizer treatments increased tree canopy volume, leaf area, chlorophyll and nutrient contents, yield, and fruit quality. T7 (19.8 g/tree-half soil and half foliar application) produced consistent results in both seasons of the study, recording the highest canopy volume, leaf area, chlorophyll and nutrient content, yield, and fruit quality, which included vitamin C and TSS. Nano-foliar application was found to be more effective than soil application. [ABSTRACT FROM AUTHOR]

Pollination is a critical process in date palms production series that affect yield and fruit quality. This study aimed to evaluate the effect of different pollination methods (spray pollen grain with zinc, boric or ascorbic acid solution) on yield and fruit quality of Barhy date palm. This study was conducted at Kom Ombo, Aswan Governorate, Egypt during 2019 and 2020 seasons. Results showed that most beneficial treatment in this concern is spraying female spathes with 0.5 to 1 g pollen grains plus 1 g zinc or ascorbic acid/L water which gave economical yield with good fruit quality. Moreover, it distinguished to save time, effort, labor, cost and more practical to it is a promising technique in the future [ABSTRACT FROM AUTHOR]

This study was conducted during two successive seasons (2016/2017 first ratoon and 2017/2018 second ratoon) of Williams banana plants. The plants grown in a private banana orchard, where clay loam soil under flood irrigation system, at 3.5x3.5m apart located at Nakada district, Quena Governorate, Egypt. Forty eight stools each containing three plants were chosen to evaluate the effect of yeast applied as soil drench and spraying ascorbic acid (V.C) on growth, yield and fruit quality. These treatments were arranged in a randomized complete block design in split plot arrangement with three replicates. The obtained results could be summarized as follows. Ascorbic acid spraying significantly increased 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 unsprayed ones. Also, these treatments significantly increased the yield components and improved the fruit quality compared to unsprayed ones. Yeast application was very effective in enhancing all growth aspects, yield and fruit characteristics compared to untreated ones. All combinations of ascorbic acid spraying on the yeast treated plants resulted in a significant increament in all growth aspects, yield components and fruit quality as compared to check treatments. The best results regarding the growth and fruiting were obtained with ascorbic acid spraying (at 200 ppm) accompanied with yeast application (at 40 g/plant) compared to other tested treatments. It is evident from the foregoing results that the application yeast at 40 g/plant and ascorbic acid at 200 ppm application four times during growth season (April, June, August & October), singly or in combination improved the growth and yield of Williams banana plants. [ABSTRACT FROM AUTHOR]