وفّر 50٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.
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وهي النباتات التي يعيش في جذورها نوع من البكتيريا القادرة على تحويل و تثبيت النيتروجين في التربة وتنتج مركبات نتروجينية تستفيد منها هذه النباتات في النمو وتركيب مكوناتها الداخلية ، المشهور من هذه النباتات هي فئة البقوليات مثل الفول
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