Firstly, because the experiments were conducted
under the conditions in which the influences of microorganisms
are minimized except the experiment on the effect of
soil sterilization, direct effects of root oxygen deficiency
on plants could be evaluated. As the results, various
factors are proved to affect the responses of yard long bean
to root oxygen deficiency. Those factors include the stage
of growth, Rhizobium inoculation and duration of the stress.