I dont think that I inoculated these, although I could be wrong. Fairly sure I did not. So, I'm guessing the beneficial rhizobium were in the container soil already, either from airborne spores, plants in the compost, or prior clover or beans.
Containers are sheltered compared to garden soil, so less likely to have rhizobia without inoculation. I wonder if inoculation is really necessary.
It would not hurt to mix these roots into garden soil for my next crop of beans.
|Fava bean roots with nitrogen fixing nodules. 7.18.16|