This study was conducted in two successive seasons 2021 and 2022 to evaluate mature trees of African -rose and Pioneer plum cultivars grafted on Nemagard rootstock. Evaluation parameters included vegetative measurements (shoot length, shoot diameter, umber of leaves and leaf area) and flowering measurements (dates of bud burst, onset of flowering, full bloom, end of flowering and onset of fruit set), fruiting attributes, yield, date of fruit maturity and fruit quality. The obtained data showed that African -rose plum cv. superior to Pioneer cv. in earlier of bud burst dates, onset of flowering, full bloom, end of flowering and onset of fruit set, the highest in initial and final fruit set percentage, as well as shoot length, number of leaves leaf area and less fruit drop percentage. While pioneer cv. gave a high yield and an increase in weight, volume, height, diameter fruit and earlier in fruit maturity abou t four to seven days and an increase in TSS %, total and reducing sugars percentage and decrease in total acidity percentage as compared with African-rose plum cultivar. It could be concluded that Pioneer plum cultivar are considered as promising cultivar under sandy soil conditions in Assiut due to their recently, high yield and early fruit ripening and fruit quality, randomized complete block design (RCBD) was followed in data analysis .

The effect of organic manures on growth, nutrient status and fruiting of Roumi Red grapevines was studied during 2004 and 2005 seasons. The study was carried out at the experimental orchard of Qena Agriculture Faculty, South Valley University, Egypt. Two organic manures namely, filter mud cake and chicken manure were used either alone or combined with an inorganic source of nitrogen (N). Organic manures were applied at 0.0, 50, 75 and 100% of the recommended dose of the inorganic N fertilization (80g/vine/year).It is evident from the obtained results that applying organic N either alone or in combination with the inorganic form was very effective in improving growth, yield, leaf nutrient composition and berry quality of vines, compared to the complete application of N as an inorganic form. The increment was associated with increasing the amount of each organic manure. Organic N fertilization alone was superior to inorganic one in this respect.The obtained results also showed that applying 75 or 100% of the N requirements for Roumi Red grapevines in an organic form was very useful in improving yield and fruit quality. In addition , it decreases the environment at pollution problems.