Little is known about the response of pomegranate to the foliar application with nutrients and gibberellic acid. A randomized complete block design (RCBD) experiment was conducted on 40-years old Manfalouty pomegranate trees grown on Upper Egypt. The study aims to investigate the effect of foliar application with gibberellic acid (GA 3 ), potassium silicate (PS), zinc sulphate (ZS) and fetrilon compi (FC) which is a mixture of micronutrients on fruiting of pomegranate trees. All the tested treatments significantly (P< 0.05) improved the yield and fruit quality and reduced the fruit cracking percentage. GA 3 and FC spraying induced a 15 and 11% increase in the fruit yield and minimized the cracking percentage by 47 and 61% compared to the control treatment, respectively. It is recommended to spray Manfalouty pomegranate trees with micronutrients, potassium silicate, or zinc sulphate twice at mid of June and August to enhance the pomegranate yield and quality.

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.

The effects of spraying barley seed sprout and/ or potassium silicate each at 0.025 to 0.1% on fruiting of Red Globe grapevines was examine during 2015 and 2016 seasons. The selected vines were sprayed three times with such two stimulants. Barley seed sprout and potassium silicate each at 0.025 to 0.1% single and combined applications improved growth aspects, leaf pigments, some nutrients, berry setting %, yield and fruit quality compared to the control treatment. Using combined applications was superior to using each alone.The effect on these parameters depended on increasing concentrations. Spraying a mixture of barley seed sprout and potassium silicate three times each at 0.05% improved yield and quality of Red Globe grapevines under Minia conditions.

This study was carried out at the Experimental Orchard, Faculty of Agriculture, Assiut University, Egypt, to study the effect of Gibberellic Acid (GA 3), Naphthalenacetic acid (NAA), calcium chloride and zinc sulphate spraying on fruiting of Manfalouty pomegranate during 2017 and 2018 seasons. The experiment was set up in a complete randomized block design with three replicates, one tree per each. GA 3 , NAA, calcium chloride (CaCl 2) and zinc sulphate (ZnSO 4) spraying significantly increased the yield/ tree compared to unsprayed ones. GA 3 spraying gave the highest yield followed by calcium chloride. On the other hand, all treatments significantly decreased the fruit cracking percentage compared to unsprayed ones. The least fruit cracking was recorded due to calcium chloride spraying. All treatments significantly increased fruit weight and fruit dimensions as well as pulp percentage and juice contents compared to unsprayed ones. Moreover, calcium chloride and zinc sulphate as well as combination of GA 3 or NAA with them significantly improved the fruit chemical constituents, whereas, GA 3 spraying alone decreased the chemical fruit constituents compared to unsprayed ones. It could be concluded that spraying Manfalouty pomegranate trees with calcium chloride (CaCl 2) at 2% and zinc sulphate at 0.025% plus GA 3 at 50 ppm or NAA 25 ppm thrice was necessary to get high yield, reduce the fruit cracking percentage and improve fruit quality.

During 2014 and 2015 seasons, Early Sweet grapevines were fertilized with the recommended rate of N via 100% mineral N, 100% plant compost (p c) enriched or not with Spirulina platensis algae(S p a) as well as via 25 to 75% inorganic N plus 25 to 75% plant compost with or without Spirulina platensis algae. The merit was replacing inorganic N partially by using plant compost enriched or not with Spirulina platensis algae. Growth characteristics, leaf pigments, N, P, and K, yield, quality of the berries and juice content of nitrite were investigated. Using N as 50% inorganic N + 50% plant compost enriched with Spirulina platensis at 10 ml/ vine improved growth characteristics, yield, cluster weight and quality of the berries. There was a gradual effect on leaf pigments, N, P, K and fruit quality with reducing the percentages of inorganic N from 100 to 0.0% and increasing percentages of plant compost with or without the algae form 0.0 to 100%. Juice content of nitrite and shot berries % gradually declined with reducing inorganic N and increasing plant compost enriched or not with Spirulina platensis algae. Using plant compost enriched with Spirulina platensis was more favorable than using plant compost alone in this respect. A pronounced promotion on yield and fruit quality of Early Sweet cultivar was observed when the vines were subjected to the recommended rate of N as 50% inorganic N plus 50% plant compost enriched with Spirulina platensis algae at 10 ml/ vine.