Rhizobium bacteria are essential for the nitrogen supply to lucerne plants. Sufficient Rhizobium bacteria in the soil make applying nitrogen fertilizer unnecessary. Land where no lucerne has been grown, will, by its nature, not have any Rhizobium bacteria. Rhizobium bacteria may still be active in soil where alfalfa has been cultivated recently, but the population declines rapidly in land under crop rotation. Using inoculated seeds ensures a high Rhizobium-bacteria content in the soil. In addition to that, Yellow Jacket Rhizobium-coated seeds have the Rhizobium bacteria close to the seed itself, which ensures maximum effectiveness.
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