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    Comparison between parental and variant soybeanBradyrhizobium strains with regard to the production of lipo-chitin nodulation signals, early stages of root infection, nodule occupancy, and N2 fixation rates

    Soybean is the most important leguminous crop in Brazil and the nitrogen required for plant growth is supplied byBradyrhizobium bacteria through the symbiotic relation established by the inoculation process. Sinc...

    M. Hungria, C. Y. M. Nishi, J. Cohn, G. Stacey in Plant and Soil (1996)