The International Geomagnetic Reference Field (IGRF) is the best
mathematical fit of the observed geomagnetic field at any specific time. It is
adopted by the International Association of Geomagnetism and Aeronomy
(IAGA). Due to the importance of
this field for navigation, magnetic survey,
geological mapping and military usage the IAGA evaluates this field every five
years.
سورية
دمشق
الحقل المغنطيسي الأرضي المرجع
المركبة الشمالية
المركبة الشرقية
المركبة الأفقية
المركبة الشاقولية
الانحراف المغنطيسي
الميل المغنطيسي
معاملات توافقية كروية
حلب
دير الزور
(International Geomagnetic Reference Field (IGRF
North component
East component
Horizontal component
Vertical component
Magnetic Declination
Magnetic Inclination
المزيد..
The research work based on an economical study on sugarbeet crop in Deir
Ezzor during the period (١٩٨٠–١٩٩٦) and the prospective horizons of it
through the cultivated area, yield and total production in order to know the
extent of cultivation deve
lopment and the factors influencing this crop.
Results showed that the area under sugarbeet was unstable which negatively
reflected on the yield and production during the studied period.
However, these changes were not important statistically for the cultivated
area (non-significant regression), while the regression was significant for the
yield and production. The results also showed the presence of negative relation
between the area and productivity of this crop.
دراسة بعض التغيرات في الصفات الإنتاجية والنوعية لصنفين من الشوندر السكري (Beta vulgaris L) ما بعد الحصاد في العروة الصيفية مقارنة بالعروة الخريفية في دير الزور
نفذت التجرية في مركز أبحاث جامعة الفرات في المريعية خلال الموسم الزراعي 2009 لدراسة الأثر المتبقي وحساب نصف العمر وفترة الامان للمبيدات الحشرية
