Question

Rhizobium bacteria are important in soil fertility because plants​

Answer 1

Rhizobia are soil bacteria that have the ability to do just that - convert nitrogen into ammonia. They multiply and form nodules attached to the plant roots of leguminous plants such as peas and beans. There are multiple species of rhizobia and not all can form nodules in all leguminous plants.

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Step-by-step explanation:

Answer 2

Rhizobium bacteria fix nitrogen after becoming established inside the root nodules of plants(such as legumes)