00526naa a2200157 a 450000100080000000500110000800800410001910000220006024501310008226000090021350000110022252000520023365000150028570000180030077300500031813195882010-12-07       1987    bl uuuu     u00u1 u    #d1 aMIRANDA, C. H. B.  aEstimation of biological nitrogen fixation associated with 11 ecotypes of Panicum maximum grown in nitrogen 15 - labeled soil.  c1987  aCNPGC.  aNitrogenio; Fixacao biologica; Panicum maximum.  aFisiologia1 aBODDEY, R. M.  tAgronomy Journalgv.79, n.3, p.558-563, 1987.