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This article in AJ

  1. Vol. 57 No. 2, p. 179-185
     
    Received: July 31, 1964
    Published: Mar, 1965


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doi:10.2134/agronj1965.00021962005700020014x

Competition for Nodule Sites Between Strains of Rhizobium japonicum Applied as Inoculum and Strains in the Soil1

  1. Herbert W. Johnson,
  2. Ura Mae Means and
  3. C. R. Weber2

Synopsis

Synopsis

Strains of Rhizobium japonicum applied as inoculum at different rates and by different methods differed greatly in the proportion of nodules produced on soybeans (Glycine max (L.) Merr.) grown in soils containing effective soybean rhizobia. The percentage of nodules produced by all strains applied at the standard rate of inoculation was low and averaged 5%. Increasing the amount of inoculum applied increased the percentage of nodules produced by some strains but had little effect on others.

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