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Synopsis Interactions were indicated by the chlorosis response of 116 soybean varieties to selected bacterial strains and by a selected group of varieties to 70 bacterial strains. The response of each of 11 varieties to 8 strains was different from that of any other variety. No two of the 8 strains resulted in the same response of all 11 varieties.
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Johnson et al. (1960) studied this question.
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