الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 32 |  |  |
| | | from | 32 | | |
Abstract
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 compost and EM 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 plant compost and EM were also investigated.According to the obtained data under the experimental and resembling conditions, it is advised to fertilize mature Sakkoti date palms with the suitable N (1000 g palm/ year) through 60% inorganic (1791 g ammonium nitrate, 33.5 % N) at the first week of March , May and July besides 20% plant compost (20 kg/ palm/ year) applied once at the first week of Jan. and Effective microorganisms (EM) at 200 ml / palm/ year once at the first week of March for improving yield qantitaively and qualitiatively and at the same time reducing fruit nitrite and nitrate pollution. Under such recommendation, it is possible for replacing 40% of mineral N fertilizers by 20% plant compost and 200 ml/ EM / palm/ year.
In a sustainable or organic date palm cultures, the application of organic and biofertilizer products such as plant compost and effective microorganisms (EM) which