Although the air is 79 percent di-nitrogen (N2), soybean plants without Bradyrhizobium japonicum are unable to utilize this nitrogen source. The soybean plant provides nutrients (carbohydrates and minerals) and a protective growing environment for the rhizobia. In turn, the rhizobia “fix” atmospheric nitrogen into ammonia (NH3), which can then be used by the soybean plant.
B. japonicum is specific to soybean and will not fix nitrogen...
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