00544naa a2200193 a 450000100080000000500110000800800410001910000160006024501090007626000090018565000130019465300080020765300230021565300080023865300150024670000260026170000180028777300450030516123571995-06-27       1989    bl ---       0--  u    #d1 aCADISCH, G.  a15N-based estimation of nitrogen fixation by eight tropical forage-legumes at two levels of PbK supply.  c1989  aFósforo  a15N  aCICLO DE NUTRIENTE  aFBN  aFORRAGEIRA1 aSYLVESTER BRADLEY, R.1 aNOSBERGER, J.  tField Crops Res.gv.22, p.181-194, 1989.