الفهرس 
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Abstract
This experiment was conducted during 2010 and 2011 seasons to study the effect of fulvic acid, micro-elements as (FeSo4.7H2o, ZnSo4.7H2o and MnSo4.H2o) and micro-organisms as (Serratia sp + Bacillus polymyxa + Pseudomonas fluorescens + Trichoderma viride + Trichoderma harzianum) on yield, fruit characters and fruit quality on Zaghloul date palm trees. The experiment carried out at the Experimental Station of the Faculty of Agriculture (Kalabsho and Zayan), Mansoura University, Dakahlia Governorate, Egypt. Female palms with similar vigor, height, pollen source and age (10 years old) were selected and subjected to the normal cultural practices applied for date palm trees and planted at 7×7m under furrow irrigation system. Seven soil application treatments were arranged in a completely randomized design with three replicates (1 replicate = 2 palm) per treatment (i.e. 7×3×2 = 42 palm). Data obtained in this study could be summarized as follows: Application of fulvic acid at 83.33 ml/palm tree + conjugation with micro-elements at (3.12 gm from FeSo4.7H2o + 1.56 gm from ZnSo4.7H2o + 1.56 gm from MnSo4.H2o) + treated palm tree with micro-organisms at 83.33 ml/palm (T7) as soil application/palm recorded the highest values of yield/palm both fruit weight, flesh weight and seed weight in the both seasons. While, (T6) application of fulvic acid at 83.33 ml/palm + treated palm tree with micro-organisms at 83.33 ml/palm tree came in the second rank as compared to other treatments. In the same time these treatments (T7 or T6) gave significant decrease in both nitrate and nitrite content in fruits.