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This article in AJ

  1. Vol. 56 No. 1, p. 60-62
    Received: June 1, 1963

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Selection of Competitive Strains of Soybean Nodulating Bacteria1

  1. Herbert W. Johnson and
  2. Ura Mae Means2



Competitive relationships of six strains of Rhizobium japonicum with chlorosis-inducing strain 76 identified under essentially sterile conditions in greenhouse tests were confirmed in the more complex environment of a field soil containing few soybean nodulating bacteria. Thirteen of 299 strains evaluated for competitiveness had a competitive advantage over strain 76 in greenhouse tests. Six strains ranked for competitiveness with strain 76 had similar ranks when evaluated in all combinations with each other.

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