What should you do when a succulent shows abnormalities? Everyone is welcome to share their views.

Back to root nodules and nitrogen fixation: the significance of the convergent evolution theory is that many plants, because their living environment is poor and the soil lacks sufficient nitrogen, eventually evolved the ability to cooperate with rhizobia by accident.

Plant nitrogen fixation is another hypothesis, known as the common ancestor theory. The common ancestor theory states that all plants found to be capable of nitrogen fixation through root nodules have no exception, Rosa.

However, as time goes on, the nitrogen element in the topsoil increases year by year. This includes nitrogen in rainwater, nitrogen left behind after various bacteria are decomposed by bacteria, and it also includes nitrogen left in the soil after plants die.

At this point, nitrogen in the soil is no longer scarce.