Teaching DSSSB TGT Mock Test 2025 General Knowledge Ecology and Environment Ecology and Functions of an ecosystem

नाइट्रोजन स्थिरीकरण किसके द्वारा किया जाता है:

1
अपरोहण
2
स्थिरीकरण जीवाणु
3
उर्वरक
4
ये सभी
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