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This article in AJ

  1. Vol. 61 No. 5, p. 813-815
     
    Received: Mar 20, 1969


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doi:10.2134/agronj1969.00021962006100050049x

Initial Competition of Root-nodule Bacteria on Soybeans in a Field Environment1

  1. B. E. Caldwell2

Abstract

Abstract

Competitive behavior of three strains of Rhizobium japonicum was evaluated in a soil free of this organism. The three strains differed in their competitive ability. Strain 110 produced 98% of the nodules when applied in combination with strain 38, and 76% when in combination with strain 76. Strain 76 produced 95% of the nodules when applied in combination with strain 38. Results from treatments inoculated with the individual strains indicated that strain 110 produced the greatest fresh weight and greatest bean yield.

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