00458naa a2200169 a 450000100080000000500110000800800410001910000130006024500900007326000090016365000090017265300080018165300080018970000170019770000160021477300580023016135641995-06-27       1990    bl uuuu     u00u1 u    #d1 aCHIU, C.  aEstimation of N2 fixation of soybean by comparison of different 15N labeling methods.  c1990  aSoja  a15N  aFBN1 aWATANABE, I.1 aYOSHIDA, T.  tSoil Sci. Plant Nutr.gv. 36, n. 3, p. 383-388, 1990.