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]]>مجموعة من العناصر الصغرى ( حديد – زنك – منجنيز ) وكذلك العناصر المتوسطة ( الماغنسيوم ) فى صورة سلفات العنصر
– تتميز هذة المركبات بالنقاوة العالية وسهولة الذوبان بالماء
– لا تترك اى رواسب فى شبكات الرى .
– حامضية التاثير الى حد كبير بما يتناسب مع طبيعة التربة المصرية ( قاعدية )
– تقلل من تكلفة اضافات العناصر الصغرى فى صورة ادتا وادها الى حد ما .
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