FIGURE 3.
Plant growth promoting effect of C. botulinum strain 2301 and C. sporogenes strain 1739 on clover after 4 weeks of growth inside a phytochamber within a natural soil system (pot experiments) using commercially available soil composed of natural clay, peat, and sod peat containing abundant nutrients. (A) Inoculation with Rhizobium leguminosarum DSM 6039; (B) inoculation with C. botulinum strain 2301 and R. leguminosarum DSM 6039; (C) inoculation with C. sporogenes strain 1739 and R. leguminosarum DSM 6039.