00447naa a2200157 a 450000100080000000500110000800800410001910000210006024501000008126000090018165000120019065000070020265300200020970000180022977300420024716112011995-06-27       1989    bl uuuu     u00u1 u    #d1 aVARGAS, A. A. T.  aCultivar and pH effects on competition for nodule sites between isolates of Rhizobium in beans.  c1989  aFeijão  aPh  aCompetitividade1 aGRAHAM, P. H.  tPlant Soilgv. 117, p. 195-200, 1989.