The answer is that his blood pressure could increase.
It is known that one of the functions of the kidney is to control blood volume. But, when one kidney is removed, the other one that remained must work for the both. So, the one remained kidney will try to control increased blood pressure, but if the one is not kidney is not enough, it could lead to increase of the blood pressure of the patient.
Rhizobia are a "group of soil bacteria that infect the roots of legumes to form root nodules". Rhizobia are found in the soil and after infection, produce nodules in the legume where they fix nitrogen gas (N2) from the atmosphere turning it into a more readily useful form of nitrogen.
