00624naa a2200205 a 450000100080000000500110000800800410001910000220006024501400008226000090022265000170023165000260024865000120027465000170028665300080030365300140031165300310032570000200035677300420037616102291995-06-27       1989    bl uuuu     u00u1 u    #d1 aPAPASTYLIANOU, I.  aEffect of nitrogen fertilization and cropping system of the reference crop on estimation of N2 fixation by vetch using 15N methodology.  c1989  aAvena Sativa  aDiluição Isotópica  aMétodo  aVicia Sativa  a15N  aConsorcio  aTransferencia de nutriente1 aDANSO, S. K. A.  tPlant Soilgv. 114, p. 227-233, 1989.