الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 81 |  |  |
| | | from | 81 | | |
Abstract
This work was carried out during the 1974,1975 and 1977 seasons on 18 years old Washington navel and 12 years old Valencia oranges grown in the agrarian reforn orchards at shino, kafr El-Sheikh governorate The purpose of this work was to study the effect of sxmrniun sulphate fertilizer rats (2,5, 3.75 or 5.00 kge / tree ) and date ( two or three applications) on yield and mineral content of Washington navel and Valencia oranges trees.