title: Short communication: Screening of native and foreign Bradyrhizobium japonicum strains for high N2 fixation in soybean.
abstract: Four local rhizobia isolates selected after two screening experiments and five USDA Bradyrhizobium japonicum strains were estimated for N2 fixation in soybean using the (15)N isotope dilution technique. Strain USDA 110 was superior to the local isolates in nodulation and N2 fixation when inoculated onto soybean cv TGX 1497-ID in a Nigerian soil and could therefore be used as an inoculant for enhanced N2 fixation in soybean in Nigeria.
authors.affiliation: Biotechnology Research Centre, Nnamdi Azikiwe University, P.M.B. 5025, Awka, Anambra State, Nigeria.
authors.forename: G U
authors.initials: GU
authors.lastname: Okereke
authors.forename: C C
authors.initials: CC
authors.lastname: Onochie