الفهرس 
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Abstract
This study was conducted in a Public experimental orchard at Kom Ombo Research Station, Hort. Res. Instit, Agric. Res. Center during the three consecutive Seasons of 2012, 2013 and 2014 in which 39 offshoots derived Sakkoti, dry date palms were selected for achieving this study. The palms were planted at 7 x 7 meters apart. The texture of the soil is silty clay.
Pruning was performed to maintain leaf bunch ratio at 10: 1. The number of female spathes per palm was adjusted to 10 spathes for all the selected palms. Pollination of the experimental palms was uniformly performed by inserting five male strands into the female spathe. Each selected palm received the common horticultural practices that are already applied in the orchard except those dealing with inorganic, organic and biofertilization of N as well as application of EM, compost tea and humic acid.
This study was conducted to asses the different effects of using the suitable N at various sources (namely inorganic, organic and bioforms) and proportions as well as application of EM1, compost tea and humic acid on some vegetative growth characters, leaf chemical composition, yield as well as some physical and chemical characteristics of Sakkoti date palm fruits. Nitrite and nitrate content of the fruits in response to application of N at different sources and proportions as well as application of EM, compost tea and humic acid were also investigated.
Each treatment was replicated three times, one Sakkoti date palm per each. Inorganic N source was applied in the source of ammonium nitrate (33.5 % N). It was splitted into three equal batches and applied at the first week of March, May and July for the three consecutive seasons. Organic N fertilizers namely farmyard manure (0.25 %N , 1.2 % , K2O and 0.55 % P2O5) was added once at the first week of Jan. during 2012 , 2013 and 2014 seasons. Compost tea at 100- 300 ml/ palm/ year was also added once at the first week of March (growth start stage). The fresh EM (each ml contains 0.6 x 107 bacterial cells) at 100 to 300 ml / palm/ year was also added once at the first week of March. Humic acid in the form of Humita.