Although some soil bacteria (e.g. Azotobacter ) can fix nitrogen by themselves rhizobia cannot.... Although some soil bacteria (e.g., Azotobacter ) can fix nitrogen by themselves, rhizobia cannot.... Although some soil bacteria (e.g. Azotobacter ) can fix nitrogen by themselves rhizobia cannot.... Although some soil bacteria (e.g., Azotobacter ) can fix nitrogen by themselves, rhizobia cannot.... Although some soil bacteria (e.g. Azotobacter ) can fix nitrogen by themselves rhizobia cannot.... Although some soil bacteria (e.g., Azotobacter ) can fix nitrogen by themselves, rhizobia cannot.... Although some soil bacteria (e.g. Azotobacter ) can fix nitrogen by themselves rhizobia cannot.... Although some soil bacteria (e.g., Azotobacter ) can fix nitrogen by themselves, rhizobia cannot....
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