الفهرس 
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Abstract
This experiment was conducted during two successive seasons of 2014 and 2015 to studied the impact of NPK-humate as foliar application in the presence or absence of some adjuvants (Methanol and Glycerol) on vegetative growth (leaf area, leaf mineral content (NPK), total Chlorophyll (a+b), length and diameter of shoots), yield and fruit quality of Floridaprince peach trees. Combined application of NPK-humate with gave higher values than the individual application and foliar application of NPK-humate (1.5%) + Methanol (3%) which gave the best effect in this respect; hence, it recorded 70.60 & 74.50 for shoot length and 0.90 & 0.90 cm for Shoot diameter in both seasons, respectively .Spraying adjuvants (methanol and glycerol) with NPK-humate specifically methanol gave the highest positive effect on N, P, K and chl (a+b leaf content. All experiential treatments increased significantly fruit number per tree and fruit weight compared to control during both seasons of study. Both yield per tree and feddan of Floridaprince peach trees were significantly increased, as soon as they treated with foliar application of NPK-humate in the presence of adjuvants (methanol and glycerol). Floridaprince peach fruit size, height and diameter were increased significantly by the foliar application of NPK-humate (1.5%) + Methanol (3%). Foliar application of NPK-humate (1.5%) + Methanol (3%) presented the highest value of SSC%; it resulted in 11.00 & 12.90 but presented the lowest value of titratable acidity percentage; it resulted in 0.68 & 0.68 %. Foliar application of NPK-humate (1.5%) + Methanol (3%) presented the highly significant effect for total sugar and anthocyanin but gave the lowest value of fruit firmness.Aim of the work :. The main objective of this work was to study the behavior of Floridaprince peach trees under different concentration of NPK-humate foliar application combined with presence or absence of adjuvants (methanol and glycerol).Conclusion: it should be recommended foliar application to methanol (3%) with NPK humate (1.5%) together which gave the highest values of vegetative growth, leaf mineral content and chlorophyll, which increased yield and improved fruit quality of peach trees.