Nodules on soybean roots at seeds inoculation by the active strain Bradyrhizobium japonicum (Kirchner, 1896), Jordan, 1982 D87 at the budding-beginning of flowering stage: A – inoculation at the sowing day, B – inoculation in 7 days before sowing (Photo: Petro Pukhtaievych, 1–11)
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